If cardiac muscle cells are unable to repolarize, this would cause
A) cardiac output to increase.
B) no harm. These cells can spontaneously depolarize anyway.
C) the heart rate to decrease. It might cause cardiac arrest.
D) an increased demand on mitochondria to produce more ATP.
E) tachycardia.

Question

Quizplus · Accepted Answer

The inability of cardiac muscle cells to repolarize would disrupt the normal cardiac cycle, potentially leading to a decreased heart rate or cardiac arrest. Repolarization is essential for the cells to be ready for the next depolarization and contraction cycle.

If Cardiac Muscle Cells Are Unable to Repolarize, This Would