Cardiac Conduction System Anatomy and Intrinsic Rates
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Questions and Answers

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?

<p>Tricuspid valve (D)</p> Signup and view all the answers

During ventricular diastole, which valves are open and closed?

<p>AV valves open, semilunar valves closed (B)</p> Signup and view all the answers

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

<p>SA node (D)</p> Signup and view all the answers

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

<p>Right atrium (A)</p> Signup and view all the answers

What is the function of the great cardiac vein?

<p>Drains blood from the anterior heart (D)</p> Signup and view all the answers

Which heart sound is known as Ventricular Gallop?

<p>S3 (A)</p> Signup and view all the answers

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

<p>Mitral regurgitation from mitral valve prolapse (C)</p> Signup and view all the answers

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

<p>Apex (B)</p> Signup and view all the answers

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

<p>End of ventricular systole (C)</p> Signup and view all the answers

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

<p>Mitral valve prolapse (B)</p> Signup and view all the answers

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

<p>Posterior descending artery branch (PDA) (A)</p> Signup and view all the answers

What is a characteristic feature of the S2 heart sound?

<p>Correlates with S1 on an EKG (D)</p> Signup and view all the answers

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

<p>Anterior cardiac vein (B)</p> Signup and view all the answers

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