Screenshot shows runs of wide QRS tachycardia. The inset shows cycle length of the tachycardia as 627 ms. This will correspond to a ventricular rate of nearly 96/min. Wide QRS tachycardia in this range is considered as an accelerated idioventricular rhythm (AIVR). AIVR is a common reperfusion arrhythmia which occurs after successful reperfusion of acute myocardial infarction – spontaneous, by thrombolysis or by primary angioplasty. It is usually a self limited arrhythmia and needs no specific treatment. It can be overridden by accelerating the sinus rate with atropine.