Blood and Nerve Supply to the Heart
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Questions and Answers

What would most likely occur if the blocked artery in the coronary circulation is not restored?

  • The myocardium supplied by the blocked artery would die (correct)
  • The coronary sinus would drain into the left atrium
  • The patient would experience temporary chest pain
  • The patient would experience increased blood pressure

    • What is the primary reason for performing a coronary artery bypass grafting?

  • To reduce blood pressure
  • To relieve angina that is not amenable to pharmacological control (correct)
  • To treat aortic stenosis
  • To widen the coronary sinus

    • Which branch of the right coronary artery supplies the S-A node?

  • Anterior interventricular branch
  • Posterior interventricular branch
  • Left coronary artery
  • Nodal branch (correct)

    • What is the origin of the left coronary artery?

    <p>Aortic sinus immediately above the left posterior cusp of the aortic valve</p> Signup and view all the answers

    Where does the coronary sinus drain into?

    <p>Right atrium to the left of and superior to the opening of the inferior vena cava</p> Signup and view all the answers

    Which vein drains directly into the right atrium crossing the atrioventricular groove?

    <p>The anterior cardiac veins</p> Signup and view all the answers

    Where is the sino-atrial (SA) node located?

    <p>Near the top of the crista terminalis, below the superior vena caval opening</p> Signup and view all the answers

    Which artery does the middle cardiac vein follow?

    <p>The posterior interventricular artery</p> Signup and view all the answers

    What effect does the parasympathetic nerve supply have on the heart?

    <p>Bradycardic</p> Signup and view all the answers

    Where do the Purkinje fibers lie within the heart?

    <p>Within the subendocardium of the ventricles</p> Signup and view all the answers

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