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.
Answer: b) Disrupting the heart during the critical period of ventricular repolarization.
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