In third-degree AV block,the site of the block is either the
A)sinus node or the internodal tracts.
B)AV node or the Purkinje fibers.
C)bundle branches or the AV node.
D)sinus node or the AV node.

Question

Quizplus · Accepted Answer

In third-degree AV block, the blockage occurs either in the AV node or further down in the conduction system, such as in the bundle branches. This prevents the atrial impulses from reaching the ventricles, leading to a complete dissociation between atrial and ventricular activities.

In Third-Degree AV Block,the Site of the Block Is Either