Atrial fibrillation can cause a drop in cardiac output because it causes
A)a loss of the atrial kick.
B)the ventricles to contract more forcefully.
C)the AV valves to remain open too long.
D)the sinus node to fire more often.

Question

Quizplus · Accepted Answer

In atrial fibrillation, there is uncoordinated and irregular atrial contractions, which can lead to a loss of the atrial kick. The atrial kick is responsible for about 15-30% of the cardiac output, therefore its loss can cause a decrease in cardiac output.

Atrial Fibrillation Can Cause a Drop in Cardiac Output Because