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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 68 bpm/regular68 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 68 bpm/regular68 bpm/regular
PR intervalPR interval 0.24 sec0.24 sec
QRS durationQRS duration 0.06 to 0.08 sec0.06 to 0.08 sec
IdentificationIdentification Sinus rhythm with first-degree Sinus rhythm with first-degree AV block, ST-segment elevationAV block, ST-segment elevation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 4 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 83 bpm (sinus beats)/ 83 bpm (sinus beats)/
Regular except for the eventRegular except for the event
Atrial rate/rhythmAtrial rate/rhythm 83 bpm (sinus beats)/ 83 bpm (sinus beats)/
Regular except for the eventRegular except for the event
PR intervalPR interval 0.20 sec0.20 sec
QRS durationQRS duration 0.08 to 0.10 sec0.08 to 0.10 sec
IdentificationIdentification Sinus rhythm with two PJCs, Sinus rhythm with two PJCs,
ST-segment elevationST-segment elevation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 83-year-old This rhythm strip is from an 83-year-old woman with syncope. woman with syncope.
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Ventricular rate/rhythmVentricular rate/rhythm 38 to 75 bpm/irregular38 to 75 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 75 bpm/regular75 bpm/regular
PR intervalPR interval LengtheningLengthening
QRS durationQRS duration 0.06 to 0.08 sec0.06 to 0.08 sec
IdentificationIdentification Second-degree AV block, type ISecond-degree AV block, type I
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 82-year-old man This rhythm strip is from an 82-year-old man complaining of back pain. complaining of back pain.
Top = lead II, bottom = MCL1Top = lead II, bottom = MCL1
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Ventricular rate/rhythmVentricular rate/rhythm 41 to 73 bpm/irregular41 to 73 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 56 to 125 bpm/irregular56 to 125 bpm/irregular
PR intervalPR interval 0.20 sec0.20 sec
QRS durationQRS duration 0.12 sec0.12 sec
IdentificationIdentification Sinus rhythm with a nonconducted PACSinus rhythm with a nonconducted PAC
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 86-year-old This rhythm strip is from an 86-year-old woman who experienced a cardiopulmonary woman who experienced a cardiopulmonary arrest. The initial rhythm was asystole. The arrest. The initial rhythm was asystole. The following rhythm resulted after IV following rhythm resulted after IV administration of epinephrine and atropine. administration of epinephrine and atropine.
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Ventricular rate/rhythmVentricular rate/rhythm 40 bpm/regular40 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration 0.18 sec0.18 sec
IdentificationIdentification Idioventricular rhythm (IVR) Idioventricular rhythm (IVR) (ventricular escape rhythm)(ventricular escape rhythm)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 69-year-old man This rhythm strip is from a 69-year-old man complaining of shortness of breath. Lung complaining of shortness of breath. Lung sounds reveal bilateral rales. Blood pressure: sounds reveal bilateral rales. Blood pressure: 160/58. 160/58.
Slide 12 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 107 bpm (sinus beats)/ 107 bpm (sinus beats)/
Regular except for the eventsRegular except for the events
Atrial rate/rhythmAtrial rate/rhythm 107 bpm (sinus beats)/ 107 bpm (sinus beats)/
Regular except for the eventsRegular except for the events
PR intervalPR interval 0.20 sec (sinus beats)0.20 sec (sinus beats)
QRS durationQRS duration 0.08 sec (sinus beats)0.08 sec (sinus beats)
IdentificationIdentification Sinus tachycardia with uniform PVCsSinus tachycardia with uniform PVCs
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 14 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 68 bpm/regular68 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 68 bpm/regular68 bpm/regular
PR intervalPR interval 0.28 sec0.28 sec
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Sinus rhythm with first-degree AV Sinus rhythm with first-degree AV block, ST-segment depressionblock, ST-segment depression
Slide 15 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 16 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 214 bpm/regular214 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.14 sec0.14 sec
IdentificationIdentification Monomorphic ventricular tachycardiaMonomorphic ventricular tachycardia
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 18 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 214 bpm (VT) to 71 bpm (atrial fib)/ 214 bpm (VT) to 71 bpm (atrial fib)/ IrregularIrregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.12 to 0.16 sec (VT) to 0.12 to 0.16 sec (VT) to 0.06 sec 0.06 sec (atrial fib)(atrial fib)
IdentificationIdentification Monomorphic VT to atrial fibrillationMonomorphic VT to atrial fibrillation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 20 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 88 bpm/regular88 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Atrial flutter with ST-segment Atrial flutter with ST-segment depressiondepression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 22 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 32 bpm/regular32 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 32 bpm (sinus beats)/ 32 bpm (sinus beats)/
None (junctional beats) to regular None (junctional beats) to regular (sinus beats)(sinus beats)
PR intervalPR interval 0.14 sec (sinus beats)0.14 sec (sinus beats)
QRS durationQRS duration 0.04 to 0.06 sec0.04 to 0.06 sec
IdentificationIdentification Junctional bradycardia with ST-Junctional bradycardia with ST-segment depression to sinus segment depression to sinus bradycardia, inverted T wavesbradycardia, inverted T waves
Slide 23 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 24 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 35 bpm/regular35 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 71 bpm/regular71 bpm/regular
PR intervalPR interval VariesVaries
QRS durationQRS duration 0.12 sec0.12 sec
IdentificationIdentification Complete (third-degree) AV block Complete (third-degree) AV block with inverted T waveswith inverted T waves
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 52-year-old man This rhythm strip is from a 52-year-old man found unresponsive, apneic, and pulseless. found unresponsive, apneic, and pulseless.
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Ventricular rate/rhythmVentricular rate/rhythm 88 bpm/regular88 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration 0.12 to 0.14 sec0.12 to 0.14 sec
IdentificationIdentification Accelerated idioventricular rhythm Accelerated idioventricular rhythm (AIVR)(AIVR)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 28 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 79 bpm (sinus beats)/ 79 bpm (sinus beats)/
Regular except for the event(s)Regular except for the event(s)
Atrial rate/rhythmAtrial rate/rhythm 79 bpm (sinus beats)/ 79 bpm (sinus beats)/
Regular except for the event(s)Regular except for the event(s)
PR intervalPR interval 0.24 sec (sinus beats)0.24 sec (sinus beats)
QRS durationQRS duration 0.08 sec (sinus beats)0.08 sec (sinus beats)
IdentificationIdentification Sinus rhythm with first-degree AV Sinus rhythm with first-degree AV block and PACsblock and PACs
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 30 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 48 to 83 bpm/irregular48 to 83 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 167 bpm/regular167 bpm/regular
PR intervalPR interval 0.24 sec0.24 sec
QRS durationQRS duration 0.12 sec0.12 sec
IdentificationIdentification Second-degree AV block type II Second-degree AV block type II with ST-segment depressionwith ST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Atrial paced activity?Atrial paced activity? YesYes
Ventricular paced activity?Ventricular paced activity? YesYes
Paced interval ratePaced interval rate 7171
IdentificationIdentification 100% paced rhythm – 100% paced rhythm – AV sequential pacemakerAV sequential pacemaker
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
These rhythm strips are from a 78-year-old These rhythm strips are from a 78-year-old man complaining of shortness of breath. He man complaining of shortness of breath. He has a history of COPD, coronary artery has a history of COPD, coronary artery disease, and hypertension. disease, and hypertension.
Slide 34 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 55 to 94 bpm/irregular55 to 94 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.10 sec0.10 sec
IdentificationIdentification Atrial fibrillation (controlled)Atrial fibrillation (controlled)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 97-year-old This rhythm strip is from a 97-year-old woman after a fall. woman after a fall.
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Ventricular rate/rhythmVentricular rate/rhythm 88 bpm/regular88 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 88 bpm/regular88 bpm/regular
PR intervalPR interval 0.24 sec0.24 sec
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Sinus rhythm with first-degree AV Sinus rhythm with first-degree AV block, ST-segment depressionblock, ST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 70-year-old man This rhythm strip is from a 70-year-old man complaining of a sharp pain across his complaining of a sharp pain across his shoulders. Blood pressure: 218/86. shoulders. Blood pressure: 218/86.
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Ventricular rate/rhythmVentricular rate/rhythm 115 bpm (sinus beats)/115 bpm (sinus beats)/
Regular except for the eventsRegular except for the events
Atrial rate/rhythmAtrial rate/rhythm 115 bpm (sinus beats)/115 bpm (sinus beats)/
Regular except for the eventsRegular except for the events
PR intervalPR interval 0.18 sec (sinus beats)0.18 sec (sinus beats)
QRS durationQRS duration 0.06 sec (sinus beats)0.06 sec (sinus beats)
IdentificationIdentification Sinus tachycardia with uniform PVCsSinus tachycardia with uniform PVCs
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 76-year-old man This rhythm strip is from a 76-year-old man complaining of indigestion. complaining of indigestion.
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Ventricular rate/rhythmVentricular rate/rhythm 32 bpm/regular32 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Junctional bradycardia with Junctional bradycardia with ST-segment depression and ST-segment depression and inverted T wavesinverted T waves
Slide 41 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 80-year-old This rhythm strip is from an 80-year-old woman complaining of weakness. woman complaining of weakness.
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Atrial paced activity?Atrial paced activity? NoNo
Ventricular paced activity?Ventricular paced activity? YesYes
Paced interval ratePaced interval rate 8383
IdentificationIdentification 100% ventricular paced rhythm100% ventricular paced rhythm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 55 bpm (sinus beats)/ 55 bpm (sinus beats)/
Regular except for the event (every Regular except for the event (every other beat is an ectopic beat)other beat is an ectopic beat)
Atrial rate/rhythmAtrial rate/rhythm 55 bpm (sinus beats)/ 55 bpm (sinus beats)/
Regular except for the event (every Regular except for the event (every other beat is an ectopic beat)other beat is an ectopic beat)
PR intervalPR interval 0.12 sec (sinus beats)0.12 sec (sinus beats)
QRS durationQRS duration 0.08 to 0.10 sec (sinus beats)0.08 to 0.10 sec (sinus beats)
IdentificationIdentification Sinus bradycardia with ventricular Sinus bradycardia with ventricular bigeminybigeminy
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 90-year-old woman This rhythm strip is from a 90-year-old woman complaining of hip pain after a fall. complaining of hip pain after a fall.
Slide 46 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 75 bpm/regular75 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 75 bpm/regular75 bpm/regular
PR intervalPR interval 0.18 sec0.18 sec
QRS durationQRS duration 0.08 to 0.10 sec0.08 to 0.10 sec
IdentificationIdentification Sinus rhythm with Sinus rhythm with ST-segment depressionST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 86-year-old This rhythm strip is from an 86-year-old woman complaining of chest pain that she woman complaining of chest pain that she rates a 4 on a scale of 0 to 10. Blood rates a 4 on a scale of 0 to 10. Blood pressure: 142/72. pressure: 142/72.
Slide 48 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 60 bpm/regular60 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 60 bpm/regular60 bpm/regular
PR intervalPR interval 0.20 sec0.20 sec
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Sinus rhythmSinus rhythm
Slide 49 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 78-year-old man This rhythm strip is from a 78-year-old man complaining of palpitations. Note the point at complaining of palpitations. Note the point at which the patient was defibrillated. which the patient was defibrillated.
Slide 50 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 63 to 79 bpm (sinus beats)/ 63 to 79 bpm (sinus beats)/ Irregular (sinus beats)Irregular (sinus beats)
Atrial rate/rhythmAtrial rate/rhythm 63 to 79 bpm (sinus beats)/ 63 to 79 bpm (sinus beats)/ Irregular (sinus beats)Irregular (sinus beats)
PR intervalPR interval 0.12 sec (sinus beats)0.12 sec (sinus beats)
QRS durationQRS duration 0.04 to 0.06 sec (sinus beats)0.04 to 0.06 sec (sinus beats)
IdentificationIdentification Monomorphic ventricular Monomorphic ventricular tachycardia – shock – ventricular tachycardia – shock – ventricular beats – sinus arrhythmiabeats – sinus arrhythmia
Slide 51 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 52 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 68 bpm /68 bpm /
Regular except for the eventRegular except for the event
Atrial rate/rhythmAtrial rate/rhythm 68 bpm / 68 bpm /
Regular except for the eventRegular except for the event
PR intervalPR interval 0.18 sec (sinus beats)0.18 sec (sinus beats)
QRS durationQRS duration 0.06 sec (sinus beats)0.06 sec (sinus beats)
IdentificationIdentification Sinus rhythm with uniform PVCsSinus rhythm with uniform PVCs
Slide 53 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 54 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 115 bpm (sinus beats)/ 115 bpm (sinus beats)/
Regular except for the eventRegular except for the event
Atrial rate/rhythmAtrial rate/rhythm 115 bpm / 115 bpm /
Regular except for the eventRegular except for the event
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.08 to 0.10 sec0.08 to 0.10 sec
IdentificationIdentification Sinus tachycardia with PACsSinus tachycardia with PACs
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 3-month-old This rhythm strip is from a 3-month-old infant who had an altered level of infant who had an altered level of responsiveness. She was limp with a responsiveness. She was limp with a respiratory rate of 4 breaths/min. Blood respiratory rate of 4 breaths/min. Blood sugar was 174. sugar was 174.
Slide 56 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 125 bpm/regular125 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 125 bpm/regular125 bpm/regular
PR intervalPR interval 0.12 to 0.16 sec0.12 to 0.16 sec
QRS durationQRS duration 0.06 sec (sinus beats)0.06 sec (sinus beats)
IdentificationIdentification Sinus tachycardia with an Sinus tachycardia with an interpolated PVCinterpolated PVC
Slide 57 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 83-year-old man This rhythm strip is from an 83-year-old man complaining of chest pain. He had a new complaining of chest pain. He had a new pacemaker implanted 5 days ago. His blood pacemaker implanted 5 days ago. His blood pressure is 148/60. pressure is 148/60.
Slide 58 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 79 bpm/regular79 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Atrial fibrillation (controlled)Atrial fibrillation (controlled)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 52-year-old man This rhythm strip is from a 52-year-old man with substernal chest pain. He has a history with substernal chest pain. He has a history of COPD and mitral valve regurgitation. Blood of COPD and mitral valve regurgitation. Blood pressure: 140/78. pressure: 140/78.
Slide 60 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 75 bpm/regular75 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 75 bpm/regular75 bpm/regular
PR intervalPR interval 0.14 sec0.14 sec
QRS durationQRS duration 0.06 to 0.08 sec0.06 to 0.08 sec
IdentificationIdentification Sinus rhythm with ST-segment Sinus rhythm with ST-segment depressiondepression
Slide 61 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 62 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 34 bpm/regular34 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 68 bpm/regular68 bpm/regular
PR intervalPR interval 0.14 to 0.16 sec0.14 to 0.16 sec
QRS durationQRS duration 0.10 sec0.10 sec
IdentificationIdentification 2:1 AV block, probably type I2:1 AV block, probably type I
Slide 63 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 64 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 60 to 98 bpm/irregular60 to 98 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 111 bpm/regular111 bpm/regular
PR intervalPR interval LengthensLengthens
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Second-degree AV block, type ISecond-degree AV block, type I
Slide 65 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 66 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 75 bpm/regular75 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Accelerated junctional rhythmAccelerated junctional rhythm
Slide 67 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 68 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 54 bpm/regular54 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Atrial fibrillation (controlled)Atrial fibrillation (controlled)
Slide 69 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 70 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm NoneNone
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration NoneNone
IdentificationIdentification AsystoleAsystole
Slide 71 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 72 of 250NextBack
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Atrial paced activity?Atrial paced activity? NoNo
Ventricular paced activity?Ventricular paced activity? YesYes
Paced interval ratePaced interval rate 6565
IdentificationIdentification 100% ventricular paced rhythm100% ventricular paced rhythm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
These rhythm strips are from a 46-year-old These rhythm strips are from a 46-year-old woman complaining of abdominal pain. woman complaining of abdominal pain.
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Ventricular rate/rhythmVentricular rate/rhythm 107 bpm (sinus beats)/ 107 bpm (sinus beats)/
Regular except for the eventsRegular except for the events
Atrial rate/rhythmAtrial rate/rhythm 107 bpm (sinus beats)/ 107 bpm (sinus beats)/
Regular except for the eventsRegular except for the events
PR intervalPR interval 0.14 sec (sinus beats)0.14 sec (sinus beats)
QRS durationQRS duration 0.06 sec (sinus beats)0.06 sec (sinus beats)
IdentificationIdentification Sinus tachycardia with uniform PVCsSinus tachycardia with uniform PVCs
Slide 75 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 61-year-old man This rhythm strip is from a 61-year-old man with a history of heart failure. with a history of heart failure.
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Ventricular rate/rhythmVentricular rate/rhythm 65 to 75 bpm (sinus beats)/Irregular65 to 75 bpm (sinus beats)/Irregular
Atrial rate/rhythmAtrial rate/rhythm 65 to 75 bpm (sinus beats)/Irregular65 to 75 bpm (sinus beats)/Irregular
PR intervalPR interval 0.32 sec (sinus beats)0.32 sec (sinus beats)
QRS durationQRS duration 0.18 sec (sinus beats)0.18 sec (sinus beats)
IdentificationIdentification Sinus rhythm with first-degree AV Sinus rhythm with first-degree AV block, wide QRS (bundle branch block, wide QRS (bundle branch block), multiform PVCs, and ST-block), multiform PVCs, and ST-segment elevationsegment elevation
Slide 77 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 1-month-old infant This rhythm strip is from a 1-month-old infant after a 3-minute seizure. after a 3-minute seizure.
Slide 78 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 130 bpm/regular130 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 130 bpm/regular130 bpm/regular
PR intervalPR interval 0.14 to 0.16 sec0.14 to 0.16 sec
QRS durationQRS duration 0.06 to 0.08 sec0.06 to 0.08 sec
IdentificationIdentification Sinus tachycardiaSinus tachycardia
Slide 79 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 80 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 45 bpm/regular45 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 115 bpm/regular115 bpm/regular
PR intervalPR interval VariesVaries
QRS durationQRS duration 0.16 sec0.16 sec
IdentificationIdentification Complete (third-degree) AV blockComplete (third-degree) AV block
Slide 81 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 72-year-old man This rhythm strip is from a 72-year-old man complaining of chest pain. complaining of chest pain.
Slide 82 of 250NextBack
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Atrial paced activity?Atrial paced activity? NoNo
Ventricular paced activity?Ventricular paced activity? YesYes
Paced interval ratePaced interval rate 6060
IdentificationIdentification 100% ventricular paced rhythm100% ventricular paced rhythm
Slide 83 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 77-year-old woman This rhythm strip is from a 77-year-old woman with a congested cough. with a congested cough.
Slide 84 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 107 to 200 bpm/irregular107 to 200 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.06 to 0.08 sec0.06 to 0.08 sec
IdentificationIdentification Atrial fibrillation (uncontrolled)Atrial fibrillation (uncontrolled)
Slide 85 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 86 of 250NextBack
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Ventricular Ventricular rate/rhythmrate/rhythm
30 bpm (junctional beats) to 56 bpm (sinus beats)/ 30 bpm (junctional beats) to 56 bpm (sinus beats)/
Irregular (junctional beats) to regular (sinus beats)Irregular (junctional beats) to regular (sinus beats)
Atrial rate/rhythmAtrial rate/rhythm None (junctional beats) to 56 bpm (sinus beats)/ None (junctional beats) to 56 bpm (sinus beats)/
None (junctional beats) to regular (sinus beats)None (junctional beats) to regular (sinus beats)
PR intervalPR interval None (junctional beats) to 0.18 (sinus beats)None (junctional beats) to 0.18 (sinus beats)
QRS durationQRS duration 0.04 sec (junctional beats) to 0.08 (sinus beats)0.04 sec (junctional beats) to 0.08 (sinus beats)
IdentificationIdentification Junctional bradycardia to sinus bradycardiaJunctional bradycardia to sinus bradycardia
Slide 87 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 88 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 83 bpm (sinus beats)/regular83 bpm (sinus beats)/regular
Atrial rate/rhythmAtrial rate/rhythm 83 bpm (sinus beats)/regular83 bpm (sinus beats)/regular
PR intervalPR interval 0.20 sec (sinus beats)0.20 sec (sinus beats)
QRS durationQRS duration 0.06 to 0.08 sec (sinus beats)0.06 to 0.08 sec (sinus beats)
IdentificationIdentification Atrial flutter to sinus rhythmAtrial flutter to sinus rhythm
Slide 89 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 90 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 96 bpm (sinus beats)/ 96 bpm (sinus beats)/
Regular except for the eventRegular except for the event
Atrial rate/rhythmAtrial rate/rhythm 96 bpm (sinus beats)/ 96 bpm (sinus beats)/
Regular except for the eventRegular except for the event
PR intervalPR interval 0.12 sec (sinus beats)0.12 sec (sinus beats)
QRS durationQRS duration 0.08 to 0.10 sec (sinus beats)0.08 to 0.10 sec (sinus beats)
IdentificationIdentification Sinus rhythm with uniform PVCsSinus rhythm with uniform PVCs
Slide 91 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 54-year-old man This rhythm strip is from a 54-year-old man who had a syncopal episode. who had a syncopal episode.
Slide 92 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 58 bpm/regular58 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 58 bpm/regular58 bpm/regular
PR intervalPR interval 0.20 sec0.20 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus bradycardiaSinus bradycardia
Slide 93 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 66-year-old man This rhythm strip is from a 66-year-old man complaining of chest pain. Blood pressure: complaining of chest pain. Blood pressure: 170/96. 170/96.
Slide 94 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 107 bpm/regular107 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 107 bpm/regular107 bpm/regular
PR intervalPR interval 0.24 sec0.24 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus tachycardia with Sinus tachycardia with
first-degree AV blockfirst-degree AV block
Slide 95 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 43-year-old woman This rhythm strip is from a 43-year-old woman complaining of palpitations. complaining of palpitations.
Slide 96 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 214 bpm/regular214 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Narrow-QRS tachycardiaNarrow-QRS tachycardia
Slide 97 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
A 43-year-old woman is complaining of palpitations. A 43-year-old woman is complaining of palpitations. The patient has a history of SVT and states she The patient has a history of SVT and states she cannot tolerate adenosine. The following rhythm is cannot tolerate adenosine. The following rhythm is observed on the cardiac monitor after diltiazem observed on the cardiac monitor after diltiazem
administration.administration.
Slide 98 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 187 bpm (atrial beats)/ 187 bpm (atrial beats)/
Regular (atrial beats)Regular (atrial beats)
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec (atrial beats)0.08 sec (atrial beats)
IdentificationIdentification Junctional to sinus Junctional to sinus to narrow-QRS tachycardiato narrow-QRS tachycardia
Slide 99 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 100 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm Unable to determineUnable to determine
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration Unable to determineUnable to determine
IdentificationIdentification Ventricular fibrillation (coarse)Ventricular fibrillation (coarse)
Slide 101 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 102 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 37 bpm/regular37 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 75 bpm/regular75 bpm/regular
PR intervalPR interval 0.28 sec0.28 sec
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification 2:1 AV block, probably type I2:1 AV block, probably type I
Slide 103 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 104 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 27 bpm/regular27 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 27 bpm/regular27 bpm/regular
PR intervalPR interval 0.22 sec0.22 sec
QRS durationQRS duration 0.12 sec0.12 sec
IdentificationIdentification Sinus bradycardia with first-degree Sinus bradycardia with first-degree AV block, wide-QRS (probable AV block, wide-QRS (probable bundle branch block), bundle branch block), ST-segment depressionST-segment depression
Slide 105 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 76-year-old woman This rhythm strip is from a 76-year-old woman complaining of back pain. Her medical history complaining of back pain. Her medical history includes a myocardial infarction 2 years ago. includes a myocardial infarction 2 years ago.
Slide 106 of 250NextBack
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Atrial paced activity?Atrial paced activity? NoNo
Ventricular paced activity?Ventricular paced activity? YesYes
Paced interval ratePaced interval rate 6565
IdentificationIdentification 100% ventricular paced rhythm100% ventricular paced rhythm
Slide 107 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 80-year-old man This rhythm strip is from an 80-year-old man found sitting in a chair. He is unresponsive, found sitting in a chair. He is unresponsive, apneic, and pulseless. apneic, and pulseless.
Slide 108 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm NoneNone
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration NoneNone
IdentificationIdentification Asystole – the electrical activity Asystole – the electrical activity shown is caused by pacemaker shown is caused by pacemaker spikes from the patient’s spikes from the patient’s permanent pacemaker (no permanent pacemaker (no capture)capture)
Slide 109 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 88-year-old This rhythm strip is from an 88-year-old woman complaining of hip pain after a fall woman complaining of hip pain after a fall injury. injury.
Slide 110 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 68 to 125 bpm/irregular68 to 125 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Atrial fibrillationAtrial fibrillation
Slide 111 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 112 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 42 to 68 bpm/irregular42 to 68 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 68 bpm/regular68 bpm/regular
PR intervalPR interval LengthensLengthens
QRS durationQRS duration 0.10 sec0.10 sec
IdentificationIdentification Second-degree AV block type I Second-degree AV block type I with a ventricular complexwith a ventricular complex
Slide 113 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 114 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 48 bpm (junctional beats)/regular48 bpm (junctional beats)/regular
Atrial rate/rhythmAtrial rate/rhythm Unable to determine (junctional beats)Unable to determine (junctional beats)
PR intervalPR interval Unable to determine (junctional beats)Unable to determine (junctional beats)
QRS durationQRS duration 0.06 to 0.08 sec0.06 to 0.08 sec
IdentificationIdentification Sinus bradycardia with a first-degree Sinus bradycardia with a first-degree AV block to junctional escape rhythmAV block to junctional escape rhythm
Slide 115 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 67-year-old woman This rhythm strip is from a 67-year-old woman found unresponsive on the side of the road. found unresponsive on the side of the road. Outdoor temperature is 112°F. Blood Outdoor temperature is 112°F. Blood pressure: 238/110, respiratory rate: 60/min. pressure: 238/110, respiratory rate: 60/min.
Slide 116 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 136 bpm/regular136 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 136 bpm/regular136 bpm/regular
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus tachycardia with Sinus tachycardia with
ST-segment depressionST-segment depression
Slide 117 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 84-year-old man This rhythm strip is from an 84-year-old man complaining of dizziness. He had a triple complaining of dizziness. He had a triple bypass 4 days ago. bypass 4 days ago.
Slide 118 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 60 bpm (sinus beats)/ 60 bpm (sinus beats)/
Regular except for the event (every Regular except for the event (every other beat is an ectopic beat)other beat is an ectopic beat)
Atrial rate/rhythmAtrial rate/rhythm 60 bpm (sinus beats)/ 60 bpm (sinus beats)/
Regular except for the eventRegular except for the event
PR intervalPR interval 0.16 sec (sinus beats)0.16 sec (sinus beats)
QRS durationQRS duration 0.08 sec (sinus beats)0.08 sec (sinus beats)
IdentificationIdentification Sinus rhythm with ventricular Sinus rhythm with ventricular bigeminy, ST-segment depressionbigeminy, ST-segment depression
Slide 119 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 81-year-old This rhythm strip is from an 81-year-old woman with an altered level of woman with an altered level of responsiveness. Blood pressure: 160/70, responsiveness. Blood pressure: 160/70, blood sugar: 114. blood sugar: 114.
Slide 120 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 56 bpm/regular56 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 56 bpm/regular56 bpm/regular
PR intervalPR interval 0.24 sec0.24 sec
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Sinus bradycardia with Sinus bradycardia with
first-degree AV blockfirst-degree AV block
Slide 121 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 80-year-old woman who This rhythm strip is from a 80-year-old woman who was playing Bingo when she felt dizzy and slumped was playing Bingo when she felt dizzy and slumped over in her chair. Bystanders state she was over in her chair. Bystanders state she was unresponsive for approximately 5 minutes. A pulse is unresponsive for approximately 5 minutes. A pulse is present. present.
Slide 122 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 75 to 94 bpm/irregular75 to 94 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Atrial fibrillation (controlled)Atrial fibrillation (controlled)
Slide 123 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 91-year-old woman This rhythm strip is from a 91-year-old woman complaining of chest pain and difficulty complaining of chest pain and difficulty breathing. breathing.
Slide 124 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 94 to 108 bpm/irregular94 to 108 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.10 sec0.10 sec
IdentificationIdentification Atrial fibrillation with Atrial fibrillation with
ST-segment elevationST-segment elevation
Slide 125 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 85-year-old This rhythm strip is from an 85-year-old woman complaining of numbness in her legs. woman complaining of numbness in her legs.
Slide 126 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 48 bpm/regular48 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 48 bpm/regular48 bpm/regular
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus bradycardiaSinus bradycardia
Slide 127 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 59-year-old woman This rhythm strip is from a 59-year-old woman who complained of sudden weakness in her who complained of sudden weakness in her legs and fell to the floor in her kitchen. legs and fell to the floor in her kitchen.
Slide 128 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 50 to 79 bpm/irregular50 to 79 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.12 sec0.12 sec
IdentificationIdentification Atrial fibrillation (controlled) Atrial fibrillation (controlled) with ST-segment elevationwith ST-segment elevation
Slide 129 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 82-year-old This rhythm strip is from an 82-year-old woman with vomiting x 2 days. woman with vomiting x 2 days.
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Ventricular rate/rhythmVentricular rate/rhythm 115 bpm/regular115 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 115 bpm/regular115 bpm/regular
PR intervalPR interval 0.18 sec0.18 sec
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Sinus tachycardiaSinus tachycardia
Slide 131 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 62-year-old woman This rhythm strip is from a 62-year-old woman complaining of chest pain. Her blood complaining of chest pain. Her blood pressure is 146/104, respirations are 20. pressure is 146/104, respirations are 20. Breath sounds are clear. Breath sounds are clear.
Slide 132 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 167 bpm/regular167 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Narrow-QRS tachycardia (SVT) Narrow-QRS tachycardia (SVT) with ST-segment depressionwith ST-segment depression
Slide 133 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 6-year-old boy This rhythm strip is from a 6-year-old boy immediately after a seizure. immediately after a seizure.
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Ventricular rate/rhythmVentricular rate/rhythm 68 to 88 bpm/irregular68 to 88 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 68 to 88 bpm/irregular68 to 88 bpm/irregular
PR intervalPR interval 0.12 sec0.12 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus arrhythmiaSinus arrhythmia
Slide 135 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 76-year-old man This rhythm strip is from a 76-year-old man who was playing golf and experienced a who was playing golf and experienced a syncopal episode. syncopal episode.
Slide 136 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 65 bpm/regular65 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 65 bpm/regular65 bpm/regular
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus rhythm with ST-segment Sinus rhythm with ST-segment elevationelevation
Slide 137 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
These rhythm strips are from a 44-year-old These rhythm strips are from a 44-year-old woman complaining of chest pain. woman complaining of chest pain.
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Ventricular rate/rhythmVentricular rate/rhythm 176 bpm/regular176 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration 0.12 to 0.14 sec0.12 to 0.14 sec
IdentificationIdentification Monomorphic ventricular Monomorphic ventricular tachycardiatachycardia
Slide 139 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 140 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 29 bpm/regular29 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 71 bpm/regular71 bpm/regular
PR intervalPR interval VariesVaries
QRS durationQRS duration 0.16 sec0.16 sec
IdentificationIdentification Complete (third-degree) AV block Complete (third-degree) AV block with ST-segment elevationwith ST-segment elevation
Slide 141 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 81-year-old This rhythm strip is from an 81-year-old woman complaining of chest pain. woman complaining of chest pain.
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Ventricular rate/rhythmVentricular rate/rhythm 76 bpm/regular76 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration 0.12 to 0.14 sec0.12 to 0.14 sec
IdentificationIdentification Accelerated idioventricular rhythm Accelerated idioventricular rhythm (AIVR)(AIVR)
Slide 143 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 74-year-old woman This rhythm strip is from a 74-year-old woman complaining of weakness. complaining of weakness.
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Atrial paced activity?Atrial paced activity? NoNo
Ventricular paced activity?Ventricular paced activity? YesYes
Paced interval ratePaced interval rate 6868
IdentificationIdentification Ventricular demand pacemakerVentricular demand pacemaker
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 146 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 75 to 150 bpm/irregular75 to 150 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Atrial flutterAtrial flutter
Slide 147 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 148 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 42 bpm (sinus beats)/ 42 bpm (sinus beats)/
Regular except for the event (every Regular except for the event (every other beat is an ectopic beat)other beat is an ectopic beat)
Atrial rate/rhythmAtrial rate/rhythm 42 bpm (sinus beats)/ 42 bpm (sinus beats)/
Regular except for the eventRegular except for the event
PR intervalPR interval 0.12 sec (sinus beats)0.12 sec (sinus beats)
QRS durationQRS duration 0.08 to 0.10 sec (sinus beats)0.08 to 0.10 sec (sinus beats)
IdentificationIdentification Sinus bradycardia with Sinus bradycardia with
ventricular bigeminyventricular bigeminy
Slide 149 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
Slide 150 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 42 bpm/regular42 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration 0.24 sec0.24 sec
IdentificationIdentification Accelerated idioventricular rhythm Accelerated idioventricular rhythm (AIVR)(AIVR)
Slide 151 of 250NextBack
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
These rhythm strips are from a 63-year-old woman These rhythm strips are from a 63-year-old woman who experienced a syncopal episode. Blood who experienced a syncopal episode. Blood pressure is 200/90, blood sugar is 98. pressure is 200/90, blood sugar is 98.
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Ventricular rate/rhythmVentricular rate/rhythm 44 bpm/regular44 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 88 bpm/regular88 bpm/regular
PR intervalPR interval 0.20 sec0.20 sec
QRS durationQRS duration 0.10 sec0.10 sec
IdentificationIdentification 2:1 AV block, probably type I2:1 AV block, probably type I
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 84-year-old This rhythm strip is from an 84-year-old woman with a nosebleed. Blood pressure: woman with a nosebleed. Blood pressure: 250/74. 250/74.
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Ventricular rate/rhythmVentricular rate/rhythm 68 bpm/regular68 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 68 bpm/regular68 bpm/regular
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus rhythmSinus rhythm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 79-year-old man This rhythm strip is from a 79-year-old man complaining of palpitations. His initial blood complaining of palpitations. His initial blood pressure was 112/84. His second blood pressure was 112/84. His second blood pressure, 8 minutes after the first, was 78/P. pressure, 8 minutes after the first, was 78/P.
Slide 156 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 147 bpm/regular147 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.06 to 0.08 sec0.06 to 0.08 sec
IdentificationIdentification Narrow-QRS tachycardia (SVT)Narrow-QRS tachycardia (SVT)with ST-segment depressionwith ST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Atrial paced activity?Atrial paced activity? NoNo
Ventricular paced activity?Ventricular paced activity? YesYes
Paced interval ratePaced interval rate 6060
IdentificationIdentification 100% ventricular paced rhythm100% ventricular paced rhythm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 80-year-old man This rhythm strip is from an 80-year-old man complaining of weakness and dizziness. complaining of weakness and dizziness. Blood pressure is 160/98, blood sugar is 88. Blood pressure is 160/98, blood sugar is 88.
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Ventricular rate/rhythmVentricular rate/rhythm 63 to 100 bpm/irregular63 to 100 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 to 0.10 sec0.08 to 0.10 sec
IdentificationIdentification Atrial fibrillation (controlled)Atrial fibrillation (controlled)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 42 to 71 bpm/irregular42 to 71 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 125 bpm/regular125 bpm/regular
PR intervalPR interval 0.24 sec0.24 sec
QRS durationQRS duration 0.10 to 0.12 sec0.10 to 0.12 sec
IdentificationIdentification Second-degree AV block type IISecond-degree AV block type II
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 58-year-old man This rhythm strip is from a 58-year-old man with chest pain that he rates as a 2 on a scale with chest pain that he rates as a 2 on a scale of 0 to 10. He states he recently began taking of 0 to 10. He states he recently began taking pills for weight control. pills for weight control.
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Ventricular rate/rhythmVentricular rate/rhythm 91 bpm (sinus beats)/ 91 bpm (sinus beats)/
Regular except for the event(s)Regular except for the event(s)
Atrial rate/rhythmAtrial rate/rhythm 91 bpm (sinus beats)/ 91 bpm (sinus beats)/
Regular except for the event(s)Regular except for the event(s)
PR intervalPR interval 0.20 sec (sinus beats)0.20 sec (sinus beats)
QRS durationQRS duration 0.06 sec (sinus beats)0.06 sec (sinus beats)
IdentificationIdentification Sinus rhythm with uniform PVCs, Sinus rhythm with uniform PVCs, ST-segment depressionST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 60-year-old woman This rhythm strip is from a 60-year-old woman complaining of palpitations and shortness of complaining of palpitations and shortness of breath. breath.
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Ventricular rate/rhythmVentricular rate/rhythm 130 to 214 bpm/irregular130 to 214 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Atrial fibrillation with a rapid Atrial fibrillation with a rapid ventricular response (RVR)ventricular response (RVR)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 60-year-old woman This rhythm strip is from a 60-year-old woman complaining of palpitations and shortness of complaining of palpitations and shortness of breath after administration of adenosine 6 mg breath after administration of adenosine 6 mg IV. IV.
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Ventricular rate/rhythmVentricular rate/rhythm 28 to 63 bpm/irregular28 to 63 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Atrial fibrillationAtrial fibrillation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 60-year-old woman This rhythm strip is from a 60-year-old woman complaining of palpitations and shortness of complaining of palpitations and shortness of breath 1 minute after administration of breath 1 minute after administration of adenosine 12 mg IV. adenosine 12 mg IV.
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Ventricular rate/rhythmVentricular rate/rhythm 18 to 21 bpm/irregular18 to 21 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Atrial fibrillationAtrial fibrillation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 60-year-old woman This rhythm strip is from a 60-year-old woman complaining of palpitations and shortness of complaining of palpitations and shortness of breath two minutes after administration of breath two minutes after administration of adenosine 6 mg IV. adenosine 6 mg IV.
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Ventricular rate/rhythmVentricular rate/rhythm 115 to 250 bpm/irregular115 to 250 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Atrial fibrillation with a rapid Atrial fibrillation with a rapid ventricular response (RVR)ventricular response (RVR)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 30 bpm (junctional beats)/irregular30 bpm (junctional beats)/irregular
Atrial rate/rhythmAtrial rate/rhythm None (junctional beats)/irregularNone (junctional beats)/irregular
PR intervalPR interval 0.16 sec (sinus beats)0.16 sec (sinus beats)
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Sinus beat - two junctional beats - Sinus beat - two junctional beats - sinus beat; ST-segment depressionsinus beat; ST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 90-year-old woman This rhythm strip is from a 90-year-old woman with shortness of breath. with shortness of breath.
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Atrial paced activity?Atrial paced activity? NoNo
Ventricular paced activity?Ventricular paced activity? YesYes
Paced interval ratePaced interval rate 6060
IdentificationIdentification 100% ventricular paced rhythm100% ventricular paced rhythm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 75 bpm (sinus beats)/ 75 bpm (sinus beats)/
Regular except for the event(s)Regular except for the event(s)
Atrial rate/rhythmAtrial rate/rhythm 75 bpm (sinus beats)/ 75 bpm (sinus beats)/
Regular except for the event(s)Regular except for the event(s)
PR intervalPR interval 0.16 to 0.18 sec (sinus beats)0.16 to 0.18 sec (sinus beats)
QRS durationQRS duration 0.04 to 0.06 sec (sinus beats)0.04 to 0.06 sec (sinus beats)
IdentificationIdentification Sinus rhythm with uniform PVCsSinus rhythm with uniform PVCs
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 100 bpm (sinus beats) to 150 bpm 100 bpm (sinus beats) to 150 bpm (VT)/Regular(VT)/Regular
Atrial rate/rhythmAtrial rate/rhythm 100 bpm (sinus beats)/100 bpm (sinus beats)/
Regular to unable to determineRegular to unable to determine
PR intervalPR interval 0.24 sec (sinus beats)0.24 sec (sinus beats)
QRS durationQRS duration 0.08 sec (sinus beats)0.08 sec (sinus beats)
IdentificationIdentification Sinus rhythm with first-degree AV Sinus rhythm with first-degree AV block to monomorphic ventricular block to monomorphic ventricular tachycardia (VT)tachycardia (VT)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 47 bpm/regular47 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 115 bpm/regular115 bpm/regular
PR intervalPR interval VariesVaries
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Complete (third-degree) AV block Complete (third-degree) AV block with ST-segment elevationwith ST-segment elevation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 88 to 167 bpm/irregular88 to 167 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determineUnable to determine
QRS durationQRS duration 0.06 to 0.08 sec0.06 to 0.08 sec
IdentificationIdentification Atrial fibrillationAtrial fibrillation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm NoneNone
Atrial rate/rhythmAtrial rate/rhythm 94 bpm/regular94 bpm/regular
PR intervalPR interval NoneNone
QRS durationQRS duration NoneNone
IdentificationIdentification P-wave asystoleP-wave asystole
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 74-year-old woman This rhythm strip is from a 74-year-old woman with chest pain. Blood pressure: 192/90. She with chest pain. Blood pressure: 192/90. She rates her pain as a 9 on a scale of 0 to 10. rates her pain as a 9 on a scale of 0 to 10.
Slide 188 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 136 bpm/regular136 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 136 bpm/regular136 bpm/regular
PR intervalPR interval 0.14 sec0.14 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus tachycardiaSinus tachycardia
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 91 bpm/91 bpm/
Regular except for the eventRegular except for the event
Atrial rate/rhythmAtrial rate/rhythm 91 bpm/91 bpm/
Regular except for the eventRegular except for the event
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Sinus rhythm with a nonconducted PACSinus rhythm with a nonconducted PAC
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 35 bpm/regular35 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 35 bpm/regular35 bpm/regular
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.06 sec0.06 sec
NoteNote U waves are present U waves are present
(they follow the T waves)(they follow the T waves)
IdentificationIdentification Sinus bradycardia with Sinus bradycardia with
ST-segment depressionST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from a 97-year-old man This rhythm strip is from a 97-year-old man with chest pain. with chest pain.
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Atrial paced activity?Atrial paced activity? YesYes
Ventricular paced activity?Ventricular paced activity? YesYes
Paced interval ratePaced interval rate 6060
IdentificationIdentification AV sequential pacemaker with AV sequential pacemaker with failure to capturefailure to capture
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 85-year-old This rhythm strip is from an 85-year-old woman with an altered level of woman with an altered level of responsiveness. Blood pressure: 136/78, responsiveness. Blood pressure: 136/78, blood sugar is 96. blood sugar is 96.
Slide 196 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 115 bpm (sinus beats)/ 115 bpm (sinus beats)/
Regular except for the eventRegular except for the event
Atrial rate/rhythmAtrial rate/rhythm 115 bpm (sinus beats)/ 115 bpm (sinus beats)/
Regular except for the eventRegular except for the event
PR intervalPR interval 0.20 sec (sinus beats)0.20 sec (sinus beats)
QRS durationQRS duration 0.08 to 0.10 sec (sinus beats)0.08 to 0.10 sec (sinus beats)
IdentificationIdentification Sinus tachycardia with a PVC and Sinus tachycardia with a PVC and a ventricular coupleta ventricular couplet
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
This rhythm strip is from an 88-year-old man This rhythm strip is from an 88-year-old man complaining of chest pain that he rates as a 6 complaining of chest pain that he rates as a 6 on a scale of 0 to 10. Blood pressure: 170/80. on a scale of 0 to 10. Blood pressure: 170/80.
Slide 198 of 250NextBack
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Ventricular rate/rhythmVentricular rate/rhythm 115 bpm (sinus beats)/ 115 bpm (sinus beats)/
Regular except for the eventRegular except for the event
Atrial rate/rhythmAtrial rate/rhythm 115 bpm (sinus beats)/ 115 bpm (sinus beats)/
Regular except for the eventRegular except for the event
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus tachycardia with PACsSinus tachycardia with PACs
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 29 bpm/essentially regular29 bpm/essentially regular
Atrial rate/rhythmAtrial rate/rhythm NoneNone
PR intervalPR interval NoneNone
QRS durationQRS duration 0.04 to 0.06 sec0.04 to 0.06 sec
IdentificationIdentification Junctional bradycardia Junctional bradycardia with ST-segment depressionwith ST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 88 bpm/regular 88 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 88 bpm/regular 88 bpm/regular
PR intervalPR interval 0.28 sec 0.28 sec
QRS durationQRS duration 0.08 sec 0.08 sec
IdentificationIdentification Sinus rhythm at 88 bpm with first-Sinus rhythm at 88 bpm with first-degree AV block; ST-segment degree AV block; ST-segment elevation elevation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 This rhythm strip is from a 44-year-old construction This rhythm strip is from a 44-year-old construction
worker with a sudden onset of chest pressure. worker with a sudden onset of chest pressure.
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Ventricular rate/rhythmVentricular rate/rhythm 52 to 94 bpm/irregular52 to 94 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 52 to 94 bpm/irregular52 to 94 bpm/irregular
PR intervalPR interval 0.12 sec0.12 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus arrhythmia at 52 to 94 bpmSinus arrhythmia at 52 to 94 bpm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Atrial pacing?Atrial pacing? NoNo
Ventricular pacing?Ventricular pacing? YesYes
Paced intervalPaced interval 8080
IdentificationIdentification Ventricular-paced rhythm with Ventricular-paced rhythm with pacemaker malfunction pacemaker malfunction
(failure to capture)(failure to capture)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 This rhythm strip is from an 82-year-old man This rhythm strip is from an 82-year-old man
complaining of back pain. complaining of back pain. Top = lead II, bottom = MCL1.Top = lead II, bottom = MCL1.
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Ventricular rate/rhythmVentricular rate/rhythm 41 to 73 bpm/irregular41 to 73 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 56 to 125 bpm/irregular56 to 125 bpm/irregular
PR intervalPR interval 0.20 sec0.20 sec
QRS durationQRS duration 0.120.12
IdentificationIdentification Sinus rhythm at 41 to 73 bpm Sinus rhythm at 41 to 73 bpm with a nonconducted PACwith a nonconducted PAC
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 78 bpm/regular except for the event 78 bpm/regular except for the event
Atrial rate/rhythmAtrial rate/rhythm 78 bpm/regular except for the event 78 bpm/regular except for the event
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Sinus rhythm at 78 bpm with a PAC, ST-Sinus rhythm at 78 bpm with a PAC, ST-segment elevation (PAC is the third segment elevation (PAC is the third
complex from left)complex from left)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 44 bpm/regular44 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 44 bpm/regular44 bpm/regular
PR intervalPR interval 0.14 sec0.14 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Junctional rhythm at 44 bpm; ST-Junctional rhythm at 44 bpm; ST-segment elevationsegment elevation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 115 bpm (sinus beats)/regular 115 bpm (sinus beats)/regular except for the event except for the event
Atrial rate/rhythmAtrial rate/rhythm 115 bpm (sinus beats)/regular 115 bpm (sinus beats)/regular except for the event except for the event
PR intervalPR interval 0.16 sec (sinus beats)0.16 sec (sinus beats)
QRS durationQRS duration 0.06 sec (sinus beats)0.06 sec (sinus beats)
IdentificationIdentification Sinus tachycardia at 115 bpm with Sinus tachycardia at 115 bpm with a PJC (fifth beat is the PJC)a PJC (fifth beat is the PJC)
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 This rhythm strip is from an 82-year-old man This rhythm strip is from an 82-year-old man
complaining of chest pain.complaining of chest pain.
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Ventricular rate/rhythmVentricular rate/rhythm 245 bpm/regular245 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 245 bpm/regular245 bpm/regular
PR intervalPR interval NoneNone
QRS durationQRS duration 0.28 sec0.28 sec
IdentificationIdentification Monomorphic ventricular Monomorphic ventricular tachycardia at 245 bpmtachycardia at 245 bpm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 21 bpm/irregular21 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 21 bpm/irregular21 bpm/irregular
PR intervalPR interval 0.36 sec0.36 sec
QRS durationQRS duration 0.08 to 0.10 sec0.08 to 0.10 sec
IdentificationIdentification Sinus bradycardia at 21 Sinus bradycardia at 21 bpm with junctional escape bpm with junctional escape
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular Ventricular rate/rhythmrate/rhythm
48 to 83 bpm/irregular48 to 83 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 167 bpm/regular 167 bpm/regular
PR intervalPR interval 0.24 sec0.24 sec
QRS durationQRS duration 0.12 sec0.12 sec
IdentificationIdentification Second-degree AV block type II Second-degree AV block type II at 48 to 83 bpm; ST-segment at 48 to 83 bpm; ST-segment depressiondepression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 115 to 215 bpm/irregular115 to 215 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determine/irregularUnable to determine/irregular
PR intervalPR interval VariesVaries
QRS durationQRS duration 0.04 to 0.06 sec0.04 to 0.06 sec
IdentificationIdentification Multifocal atrial tachycardia Multifocal atrial tachycardia at 115 to 215 bpm with ST-at 115 to 215 bpm with ST-segment depressionsegment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 71 bpm, regular71 bpm, regular
Atrial rate/rhythmAtrial rate/rhythm 71 bpm, regular71 bpm, regular
PR intervalPR interval 0.16 to 0.20 sec0.16 to 0.20 sec
QRS durationQRS duration 0.12 to 0.14 sec0.12 to 0.14 sec
IdentificationIdentification Sinus rhythm at 71 bpm with a wide QRS, Sinus rhythm at 71 bpm with a wide QRS,
ST-segment depressionST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular Ventricular rate/rhythmrate/rhythm
94 bpm (sinus beats)/irregular 94 bpm (sinus beats)/irregular
Atrial rate/rhythmAtrial rate/rhythm 94 bpm (sinus beats)/irregular 94 bpm (sinus beats)/irregular
PR intervalPR interval 0.16 sec (sinus beats) 0.16 sec (sinus beats)
QRS durationQRS duration 0.08 sec (sinus beats) 0.08 sec (sinus beats)
IdentificationIdentification Sinus rhythm with an episode of Sinus rhythm with an episode of couplets and a run of VT couplets and a run of VT
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 This rhythm strip is from a 73-year-old man complaining of chest pain. History of hypertension and lung disease. Medications include aspirin, albuterol, and Lotensin.
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Ventricular rate/rhythmVentricular rate/rhythm 44 bpm/regular44 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 44 bpm/regular44 bpm/regular
PR intervalPR interval 0.16 sec0.16 sec
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Sinus bradycardia at 44 bpm, ST-segment Sinus bradycardia at 44 bpm, ST-segment depression. Note the upright U waves depression. Note the upright U waves following each T wave. following each T wave.
U wave
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular Ventricular rate/rhythmrate/rhythm
60 to 98 bpm/irregular60 to 98 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm 111 bpm/regular111 bpm/regular
PR intervalPR interval LengthensLengthens
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Second-degree AV block type I at Second-degree AV block type I at 68 to 90 bpm; ST-segment 68 to 90 bpm; ST-segment depressiondepression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 This rhythm strip is from a 69-year-old man who is This rhythm strip is from a 69-year-old man who is
disoriented. He knows his name but has no idea disoriented. He knows his name but has no idea where he is or how he got there. BP: 172/98, R: 20. where he is or how he got there. BP: 172/98, R: 20. Blood sugar: 127 mg/dL.Blood sugar: 127 mg/dL.
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Ventricular rate/rhythmVentricular rate/rhythm 79 bpm/regular79 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 79 bpm/regular79 bpm/regular
PR intervalPR interval 0.18 sec0.18 sec
QRS durationQRS duration 0.06 to 0.08 sec0.06 to 0.08 sec
IdentificationIdentification Sinus rhythm at 79 bpmSinus rhythm at 79 bpm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 This rhythm strip is from a 35-year-old woman This rhythm strip is from a 35-year-old woman
complaining of chest pain and palpitations. complaining of chest pain and palpitations.
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Ventricular rate/rhythmVentricular rate/rhythm 188 bpm/regular188 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm Unable to determineUnable to determine
PR intervalPR interval Unable to determine Unable to determine
QRS durationQRS duration 0.06 sec0.06 sec
IdentificationIdentification Narrow-QRS tachycardia (AVNRT) Narrow-QRS tachycardia (AVNRT) with ST-segment depressionwith ST-segment depression
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular rate/rhythmVentricular rate/rhythm 64 bpm (sinus beats)/regular except for 64 bpm (sinus beats)/regular except for the event the event
Atrial rate/rhythmAtrial rate/rhythm 64 bpm (sinus beats)/regular except for 64 bpm (sinus beats)/regular except for the event the event
PR intervalPR interval 0.16 to 0.18 sec0.16 to 0.18 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus rhythm with an episode of sinus Sinus rhythm with an episode of sinus arrest and a junctional escape beatarrest and a junctional escape beat
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 This rhythm strip is from an 82-year-old man complaining of back pain.
Lead II
Lead MCL1
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Ventricular rate/rhythmVentricular rate/rhythm 75 bpm/regular except for event 75 bpm/regular except for event
Atrial rate/rhythmAtrial rate/rhythm 75 bpm/regular except for event 75 bpm/regular except for event
PR intervalPR interval 0.20 sec0.20 sec
QRS durationQRS duration 0.12 sec0.12 sec
IdentificationIdentification Sinus rhythm at 75 bpm with a wide QRS Sinus rhythm at 75 bpm with a wide QRS and a nonconducted PACand a nonconducted PAC
Lead II
Lead MCL1
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 This rhythm strip is from a 51-year-old man This rhythm strip is from a 51-year-old man
complaining of dull chest pain that began about 2 complaining of dull chest pain that began about 2 hours ago. He rates his discomfort as a 6 on a scale hours ago. He rates his discomfort as a 6 on a scale of 1 to 10. BP: 70/48, R: 24. His skin is cool, pale, of 1 to 10. BP: 70/48, R: 24. His skin is cool, pale, and diaphoretic.and diaphoretic.
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Ventricular rate/rhythmVentricular rate/rhythm 48 bpm/regular48 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 71 bpm/slightly irregular71 bpm/slightly irregular
PR intervalPR interval VariesVaries
QRS durationQRS duration 0.08 to 0.10 sec0.08 to 0.10 sec
IdentificationIdentification Complete AV block at 48 bpm Complete AV block at 48 bpm with ST-segment elevationwith ST-segment elevation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular Ventricular rate/rhythmrate/rhythm
250 to 333 bpm/irregular 250 to 333 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determine Unable to determine
PR intervalPR interval Unable to determine Unable to determine
QRS durationQRS duration 0.16 sec0.16 sec
IdentificationIdentification Polymorphic VT at 250 to Polymorphic VT at 250 to 333 bpm333 bpm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Atrial pacing?Atrial pacing? NoNo
Ventricular Ventricular pacing?pacing?
YesYes
Paced intervalPaced interval 7474
IdentificationIdentification 100% ventricular paced rhythm 100% ventricular paced rhythm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 These rhythm strips are from a 78-year-old man complaining of shortness of breath. He has a history of COPD, coronary artery disease, and hypertension.
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Ventricular Ventricular rate/rhythmrate/rhythm
55-94 bpm/irregular55-94 bpm/irregular
Atrial rate/rhythmAtrial rate/rhythm Unable to determine Unable to determine
PR intervalPR interval Unable to determine Unable to determine
QRS durationQRS duration 0.10 sec0.10 sec
IdentificationIdentification Controlled atrial fibrillation at 55-94 bpm Controlled atrial fibrillation at 55-94 bpm
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1
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Ventricular Ventricular rate/rhythmrate/rhythm
50 bpm/regular 50 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 167 bpm/regular167 bpm/regular
PR intervalPR interval VariesVaries
QRS durationQRS duration 0.06 sec 0.06 sec
IdentificationIdentification Third-degree AV block at 50 Third-degree AV block at 50 bpm; ST-segment elevation bpm; ST-segment elevation
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Rhythm Recognition - Part 1Rhythm Recognition - Part 1 This rhythm strip is from a 1-year-old girl. Mom says This rhythm strip is from a 1-year-old girl. Mom says
the infant suddenly went limp and her limbs began the infant suddenly went limp and her limbs began shaking. The episode lasted about 45 sec. Her shaking. The episode lasted about 45 sec. Her temperature is normal. temperature is normal.
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Ventricular rate/rhythmVentricular rate/rhythm 215 bpm/regular215 bpm/regular
Atrial rate/rhythmAtrial rate/rhythm 215 bpm/regular215 bpm/regular
PR intervalPR interval 0.10 sec0.10 sec
QRS durationQRS duration 0.08 sec0.08 sec
IdentificationIdentification Sinus tachycardia at 215 bpmSinus tachycardia at 215 bpm
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