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ADA NBDE National Board Dental Part I

Category - NBDE

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In about 60% of cases, the SA node derives its vascular supply from which of the following?

anterior interventricular artery
left circumflex artery
posterior interventricular artery
right coronary artery

Explanation

Answer: D - In 60% of patients, the right coronary artery supplies the SA node. In a third of the population, the SA node is supplied by the left coronary artery, and in some patients it receives branches from both the right and the left.

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ADA NBDE National Board Dental Part I

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ADA NBDE National Board Dental Part I

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