First Degree Heart Block is caused by:
A)a block at the SA node.
B)slow conduction through the AV node.
C)a complete block in the ventricles.
D)intermittent conduction through the ventricles.

Question

Quizplus · Accepted Answer

First Degree Heart Block is caused by a delay in the conduction of electrical impulses from the atria to the ventricles, resulting in a prolonged PR interval on an ECG. This delay occurs at the level of the AV node, which is responsible for slowing down the electrical signal and coordinating the contraction of the atria and ventricles. Therefore, choice B (slow conduction through the AV node) is the correct answer.

First Degree Heart Block Is Caused By