An antiarrhythmic drug that prolongs the effective refractory period of the cardiac action potential

Question

Quizplus · Accepted Answer

Antiarrhythmic drugs that prolong the effective refractory period of the cardiac action potential do not speed up repolarization, generally increase heart rate, or decrease the time interval between cardiac action potentials. Instead, they slow down the heart rate by prolonging the period during which the heart muscle cannot be re-excited, helping to prevent arrhythmias.

An Antiarrhythmic Drug That Prolongs the Effective Refractory Period of the Cardiac