Which structures would not receive an electrical impulse when the patient is experiencing a left bundle branch block?

a. Atrioventricular (AV) node
b. Sinoatrial (SA) node
c. Bundle of His
d. The left ventricle


ANS: D
The left bundle branch conducts impulses to the left ventricle; the AV node feeds conduction of the bundles. The SA node initiates conduction while the bundle of His precedes the division of the left and right bundles.

Health Professions

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