In First Degree Heart Block, the pacemaker site is usually in the:
A)ventricles.
B)Bundle of His.
C)AV node.
D)SA node.

Question

Quizplus · Accepted Answer

In First Degree Heart Block, the pacemaker site is usually in the SA node. First Degree Heart Block is characterized by a prolonged PR interval on the ECG, indicating a delay in the transmission of electrical impulses from the atria to the ventricles. However, the SA node typically remains the primary pacemaker, generating impulses at a normal rate.

In First Degree Heart Block, the Pacemaker Site Is Usually