Cardiac Anatomy: Coronary Sinus Pathway and Branches Quiz

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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?

Interventricular septum Signup and view all the answers

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

Right coronary artery Signup and view all the answers

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

Left dominance Signup and view all the answers

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

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

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

Artery of S.A. node Signup and view all the answers

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

40% Signup and view all the answers

Where does the left coronary artery originate from?

Ascending aorta Signup and view all the answers

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

Right atrium Signup and view all the answers

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

Myocardial infarction Signup and view all the answers

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

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

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

Anterior cardiac veins Signup and view all the answers

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

Inferior myocardial infarction Signup and view all the answers

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

Posterior one-third of the interventricular septum Signup and view all the answers

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

Anterior myocardial infarction Signup and view all the answers

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

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