Accelerated idioventricular rhythm is also the most common reperfusion arrhythmia in humans.

Accelerated idioventricular rhythm (AIVR) which looks like slow ventricular tachycardia is a sign of a successful reperfusion.

In accelerated idioventricular rhythm (AIVR), the rate of cardiac contraction is determined by the intrinsic rate of depolarization of the cardiac cells.

The accelerated idioventricular rhythm occurs when depolarization rate of a normally suppressed focus increases to above that of the "higher order" focuses (the sinoatrial node and the atrioventricular node).