In first-degree AV block,the site of the block is the
A)sinus node.
B)AV node.
C)interatrial tracts.
D)bundle branches.

Question

Quizplus · Accepted Answer

In first-degree AV block, the site of the block is in the AV node. This results in a prolongation of the PR interval on the electrocardiogram (ECG), indicating that the conduction of the electrical impulses from the atria to the ventricles is slower than normal. The sinus node, interatrial tracts, and bundle branches are not typically involved in first-degree AV block.

In First-Degree AV Block,the Site of the Block Is the