If the connection between the SA node and AV node becomes blocked,
A) the ventricles will beat faster.
B) the ventricles will beat independently of the atria.
C) the ventricular rate of contraction will not be affected.
D) the stroke volume will increase.
E) tachycardia will occur.

Question

Quizplus · Accepted Answer

If the connection between the SA node and AV node becomes blocked, the ventricles will beat independently of the atria. This is a condition called heart block, and can result in a slower heart rate, as well as other symptoms such as dizziness, fainting, or shortness of breath. The ventricular rate of contraction may or may not be affected, depending on the severity of the block. Tachycardia is not a likely occurrence in this situation. Stroke volume may also be affected, but the most immediate and significant consequence of heart block is the disruption of the normal electrical conduction pathway of the heart.

If the Connection Between the SA Node and AV Node