Cardiac Anatomy: Coronary Sinus Pathway and Branches Quiz
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Questions and Answers

Which portion of the left ventricle is primarily supplied by the left anterior descending (LAD) artery?

  • Posterior wall
  • Lateral wall
  • Apical portion (correct)
  • Basal portion
  • In the case of left dominance, which artery supplies the posterior interventricular groove?

  • Circumflex artery (correct)
  • Obtuse marginal artery
  • Left anterior descending artery
  • Right coronary artery
  • Which of the following is the most common variation in the branching pattern of the coronary arteries?

  • Right dominance (correct)
  • Left dominance
  • Coronary artery anomaly
  • Balanced dominance
  • Which structure is supplied by the atrioventricular branch of the left coronary artery?

    <p>Interventricular septum</p> Signup and view all the answers

    In the case of right dominance, which artery supplies the posterior interventricular groove?

    <p>Right coronary artery</p> Signup and view all the answers

    Which of the following is the least common variation in the branching pattern of the coronary arteries?

    <p>Left dominance</p> Signup and view all the answers

    What is the course of the right coronary artery described in the text?

    <p>It passes between the right auricle and pulmonary trunk before descending.</p> Signup and view all the answers

    Which artery typically supplies the sinoatrial node according to the text?

    <p>Artery of S.A. node</p> Signup and view all the answers

    In what percentage of the population does the artery of S.A. node arise from the circumflex artery?

    <p>40%</p> Signup and view all the answers

    Where does the left coronary artery originate from?

    <p>Ascending aorta</p> Signup and view all the answers

    Which structure is NOT supplied by the right posterior descending artery?

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

    What specific heart condition can result from damage to vessels supplying portions of the conducting system?

    <p>Myocardial infarction</p> Signup and view all the answers

    Which of the following statements accurately describes the distribution of the left coronary artery?

    <p>The left coronary artery supplies the anterior two-thirds of the interventricular septum, the anterior part of the left ventricle, and the left atrium.</p> Signup and view all the answers

    Which of the following veins does NOT directly drain into the coronary sinus?

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

    In which of the following conditions would the right coronary artery be most likely to be affected?

    <p>Inferior myocardial infarction</p> Signup and view all the answers

    Which of the following structures is NOT supplied by the left coronary artery?

    <p>Posterior one-third of the interventricular septum</p> Signup and view all the answers

    In which of the following conditions would the left anterior descending artery be most likely to be affected?

    <p>Anterior myocardial infarction</p> Signup and view all the answers

    Which of the following is a potential anatomical variation in the origin of the coronary arteries?

    <p>The right coronary artery arising from the left posterior aortic sinus</p> Signup and view all the answers

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