A 50-year old received trauma to the chest that caused severe impairment of the primary pacemaker cells of the heart.Which of the following areas received the greatest damage?
A) Atrioventricular (AV) node
B) Sinoatrial (SA) node
C) Bundle of His
D) Ventricles

Question

Quizplus · Accepted Answer

The sinoatrial (SA) node is the primary pacemaker of the heart, responsible for initiating the heartbeat and setting the pace for the heart rate. Damage to this area would impair the primary pacemaker cells.

A 50-Year Old Received Trauma to the Chest That Caused