Cardiac Conduction System Anatomy and Intrinsic Rates

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Where is the SA node located?

Lower posterior part of right atrium

Upper anterior part of right atrium

Upper posterior part of right atrium (correct)

Upper posterior part of left atrium

Which structure extends from the AV node through the fibrous skeleton into the interventricular septum?

Left Bundle Branches

Purkinje fibers

Right Bundle Branches

Bundle of His (correct)

What is the intrinsic rate of the Purkinje fibers?

40-60 bpm

60-100 bpm

20-40 bpm (correct)

80-120 bpm

Which structure is NOT part of the conduction system of the heart?

Tricuspid valve Signup and view all the answers

During ventricular diastole, which valves are open and closed?

AV valves open, semilunar valves closed Signup and view all the answers

What structure is responsible for the primary pacemaker activity in the heart?

SA node Signup and view all the answers

Which part of the heart is primarily supplied by the right coronary artery?

Right atrium Signup and view all the answers

What is the function of the great cardiac vein?

Drains blood from the anterior heart Signup and view all the answers

Which heart sound is known as Ventricular Gallop?

S3 Signup and view all the answers

What is primarily associated with a late systolic murmur occurring in mid to late systole?

Mitral regurgitation from mitral valve prolapse Signup and view all the answers

Which structure is mainly supplied by the left anterior descending artery (LAD)?

Apex Signup and view all the answers

During which phase of the cardiac cycle does the T wave represent ventricular repolarization?

End of ventricular systole Signup and view all the answers

What does a mid-systolic click typically indicate in relation to heart sounds?

Mitral valve prolapse Signup and view all the answers

Which of the following arteries originates from the right coronary sinus?

Posterior descending artery branch (PDA) Signup and view all the answers

What is a characteristic feature of the S2 heart sound?

Correlates with S1 on an EKG Signup and view all the answers

Which structure drains blood from the anterior heart into the coronary sinus and right atrium?

Anterior cardiac vein Signup and view all the answers

Cardiac Conduction System Anatomy and Intrinsic Rates

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