Chapter 02: Basic Electrophysiology

Aehlert: ECGs Made Easy, 6th Edition

MULTIPLE CHOICE

1. 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

ANS: A

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 sup...
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