In most patients, the sinoatrial (SA) and atrioventricular (AV) nodes are supplied by the _____ coronary artery.
A) right
B) left main
C) circumflex
D) left anterior descending

Question

Quizplus · Accepted Answer

The SA node receives its blood supply from the SA node artery that runs lengthwise through the center of the node. The SA node artery originates from the right coronary artery in about 60% of people. The AV node is supplied by the right coronary artery in 85% to 90% of the population. In the remainder, the circumflex artery provides the blood supply.

In Most Patients, the Sinoatrial (SA) and Atrioventricular (AV) Nodes