EKG for Sleep Lab
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Transcript of EKG for Sleep Lab
EKG For Sleep lab.
Abdul Alraiyes MD
Electrocardiogram ECG “EKG”
PQRST
PR interval
PR interval
T wave
PQRST
PQRST
PQRST
Axis
Axis
Axis
Sinus Rhythm
Sinus Bradycardia
Sinus tachycardia
Atrioventricular delay
Atrioventricular delay
1st degree heart block
PR
PP PR RR
Characterized by a fixed and prolonged PR interval (>0.20 seconds)
2nd degree heart block type IMobitz I
P
R
P
P P
R R
•Progressive prolongation of the P-R interval•The QRS duration is normal and the P is upright and uniform•The P-R interval gets longer until an impulse is not conducted due to the refractory state of the bundle of His
2nd degree heart block type IIMobitz II
P
R
P
R R
P
P P P
P
R
This is defined by most beats conducted with a constant PR interval (either normal or prolonged)Occasionally there is an atrial contraction without a subsequent ventricular contraction.
3d degree heart block Complete HB
P
R
P P P P P
RRR R
Characterized by complete AV dissociation because the atria and ventricles are each controlled by separate pacemakers
Bundle Branch Block
Bundle Branch Block
P
R
P P P P
RRR R
Sinus Pause
P P P
RRR
Sinus pause is a delay of activation within the atria for a period between 1.5 and 3 seconds to which the previous sinus interval is not a harmonic.
What is the difference?
Premature contractions and escape rhythm
Premature Ventricular Contractions “PVC”
QRS complex >0.12 seconds Sinus P wave often obscured by the QRS, ST segment or T wave of the PVC
Multifocal PVC
QRS complex >0.12 seconds Sinus P wave often obscured by the QRS, ST segment or T wave of the PVC
PVC
PVC
Junctional rhythm
Inverted P wave
Accelerated Junctional rhythm
Inverted P wave
Tachycardia
Supraventricular Tachycardia
QRS complex <0.12 seconds Sinus P wave often obscured by the QRS
Atrial Fibrillation
Inability to count the atrial rhythm characterized by indeterminate p waves. The complex is described as IRREGULARLY IRREGULARHigh short term RR interval variation Lack of visible p waves
Atrial Flutter
Sawtooth atrial waveforms
Nonsustained ventricular tachycardia
More than 3 consecutive premature ventricular complexes (with QRS width >0.12 sec) Last no more than 6 seconds and terminate spontaneously Average rate of the entire episode greater than or equal to 100 beats/min.
Ventricular fibrillation
Questions?
Thank You