What is considered the pacemaker of the heart?
A) The AV node
B) The bundle of HIS
C) The Purkinje fibers
D) The SA node

Question

Quizplus · Accepted Answer

The SA (sinoatrial) node is considered the "natural pacemaker" of the heart because it generates electrical impulses that initiate each heartbeat. The other choices play important roles in the conduction of electrical impulses through the heart, but they do not have the same pacemaker function as the SA node.

What Is Considered the Pacemaker of the Heart