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Conduction Conduction SystemSystem

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ECGECG

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Cardiac Cardiac CycleCycle

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Cardiac Cardiac OutputOutput

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Blood Blood VesselsVessels

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Blood Blood PressurePressure

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The heart contains this The heart contains this special type of muscle special type of muscle

tissue.tissue.

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What is a cardiac What is a cardiac muscle tissue?muscle tissue?

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The normal The normal range for range for

heart rate.heart rate.

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What is 60-100 What is 60-100 bpm?bpm?

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Area of tissue Area of tissue known as “The known as “The Pacemaker” of Pacemaker” of

the heart.the heart.

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What is the What is the Sinoatrial (SA) Sinoatrial (SA)

node?node?

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The SA node The SA node causes the causes the

contraction of contraction of these two these two

heart heart chambers.chambers.

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What are the What are the atria?atria?

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List the five List the five components of components of the conduction the conduction

system in system in order.order.

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What are the What are the SA node, AV SA node, AV

node, AV node, AV bundle, bundle bundle, bundle branches, and branches, and

Purkinje fibers?Purkinje fibers?

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The letters The letters ECG stand for ECG stand for

this.this.

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What is What is ElectroCardioGraElectroCardioGra

m?m?

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In an ECG, the In an ECG, the P wave P wave

represents.represents.

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What is atrial What is atrial contraction?contraction?

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In an ECG, the In an ECG, the QRS wave QRS wave

represents.represents.

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What is What is ventricular ventricular

contraction and contraction and atrial relaxation?atrial relaxation?

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Draw a typical Draw a typical ECG and label ECG and label

the waves with the waves with the correct the correct

letters.letters.

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If a person’s ECG is If a person’s ECG is abnormal and it is found abnormal and it is found

that her own intrinsic that her own intrinsic conduction system is not conduction system is not

working properly this working properly this type of medical device my type of medical device my be attached to her heart.be attached to her heart.

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What is What is pacemaker?pacemaker?

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Name given to Name given to the phase of the the phase of the

cardiac cycle cardiac cycle when the when the ventricles ventricles contract.contract.

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What is systole?What is systole?

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Name given to Name given to the phase of the the phase of the

cardiac cycle cardiac cycle when the when the

ventricles relax.ventricles relax.

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What is diastole?What is diastole?

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Causes the first Causes the first heart sound – heart sound –

“Lub”“Lub”

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What is closure What is closure of the AV valves?of the AV valves?

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Causes the Causes the second heart second heart

sound – “Dub”sound – “Dub”

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What is closure What is closure of the aortic and of the aortic and pulmonic valves?pulmonic valves?

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Abnormal or Abnormal or unusual heart unusual heart sounds caused sounds caused by turbulent by turbulent

blood flow in the blood flow in the heart are called heart are called

this.this.

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What are heart What are heart murmurs?murmurs?

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The two factors The two factors that determine that determine cardiac output.cardiac output.

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What are heart What are heart rate and stroke rate and stroke

volume? volume? (CO=HRxSV)(CO=HRxSV)

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Term used to Term used to describe the amount describe the amount of blood pumped by a of blood pumped by a

ventricle with each ventricle with each beat.beat.

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What is the What is the stroke volume?stroke volume?

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This is a person’s This is a person’s cardiac output if his cardiac output if his

stroke volume is stroke volume is 70ml/beat and his 70ml/beat and his

heart rate is heart rate is 60beats/min.60beats/min.

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What is What is 4,200ml/min?4,200ml/min?

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If the heart If the heart pumps 5250 pumps 5250

ml/min. What ml/min. What amount returns amount returns

to the heart to the heart every min.?every min.?

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What is 5250 What is 5250 ml/min.?ml/min.?

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The total volume The total volume of blood in the of blood in the human body human body

(approximately).(approximately).

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What is What is approximately 5 approximately 5

liters?liters?

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Type of blood Type of blood vessels that vessels that

carry blood away carry blood away from the heart.from the heart.

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What is an What is an artery?artery?

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Type of blood Type of blood vessel that vessel that

carries blood carries blood back to the back to the

heart.heart.

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What is a vein?What is a vein?

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Name of blood Name of blood vessels capable vessels capable of exchanging of exchanging materials with materials with

body cells.body cells.

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What are What are capillaries?capillaries?

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Structures found Structures found in veins that help in veins that help

them to return them to return blood to the blood to the

heart against heart against gravity.gravity.

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What are valves?What are valves?

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Type of blood Type of blood vessel that has a vessel that has a

thick muscle thick muscle layer and elastic layer and elastic

tissue.tissue.

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What is an What is an artery?artery?

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A person’s A person’s highest blood highest blood

pressure occurs pressure occurs during this phase during this phase

of the cardiac of the cardiac cycle.cycle.

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What is systole or What is systole or ventricular ventricular

contraction?contraction?

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Type of blood Type of blood vessel in which vessel in which

blood pressure is blood pressure is highest.highest.

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What is the aorta What is the aorta or the major or the major

arteries?arteries?

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Type of blood Type of blood vessel in which vessel in which

blood pressure is blood pressure is the lowest.the lowest.

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What are the What are the major veins or major veins or

the vena cavae?the vena cavae?

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The two factors The two factors that determine that determine blood pressure.blood pressure.

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What are cardiac What are cardiac output and output and peripheral peripheral resistance? resistance? (BP=COxPR)(BP=COxPR)

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The blood in veins is The blood in veins is often at such low often at such low

pressures that it can’t pressures that it can’t move against gravity to move against gravity to

return to the heart. return to the heart. Name a mechanism Name a mechanism that helps venous that helps venous blood return to the blood return to the

heart.heart.

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What is the What is the muscular pump?muscular pump?