Elective cardioversion is similar to defibrillation except that the electrical stimulation waits to discharge until an R wave appears. What does this prevent?
A) Disrupting the heart during the critical period of atrial repolarization.
B) Disrupting the heart during the critical period of ventricular repolarization.
C) Disrupting the heart during the critical period of ventricular depolarization.
D) Disrupting the heart during the critical period of atrial depolarization.

Question

Quizplus · Accepted Answer

Elective cardioversion synchronizes the electrical discharge to the peak of the R wave, which is during ventricular depolarization, to avoid delivering a shock during the vulnerable period of ventricular repolarization. This prevents the risk of inducing ventricular fibrillation, which can occur if the shock is delivered during the T wave (ventricular repolarization).

Elective Cardioversion Is Similar to Defibrillation Except That the Electrical