Question:medium
Accelerated idioventricular rhythm (AIVR) is the most common arrhythmia associated with:
Accelerated idioventricular rhythm (AIVR) is the most common arrhythmia associated with:
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AIVR is famous as the reperfusion arrhythmia after a blocked artery reopens.
Updated On: Jun 24, 2026
- Dilated cardiomyopathy
- Myocardial reperfusion
- Digitalis intoxication
- Myocarditis
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The Correct Option is B
Solution and Explanation
Accelerated idioventricular rhythm is a wide, regular rhythm coming from a ventricular pacemaker that fires a little faster than usual, giving a rate roughly between 40 and 120 beats a minute. The question wants the single setting where it shows up most often.
The answer hinges on knowing its nickname, the reperfusion arrhythmia. When a blocked coronary artery is opened, whether by clot-busting drugs or by angioplasty, the suddenly reperfused muscle often throws up exactly this rhythm. So myocardial reperfusion is the condition most strongly tied to AIVR, making that the correct choice. Helpfully, the rhythm is benign and short lived, and its appearance after treatment of a heart attack is taken as a sign the artery is flowing again.
Looking at the alternatives, dilated cardiomyopathy tends to produce ventricular tachycardia and atrial fibrillation rather than AIVR. Digitalis poisoning is famous for atrial tachycardia with block and bidirectional ventricular tachycardia. Myocarditis can cause many rhythm and conduction problems, but none of these claims AIVR as its most typical arrhythmia.
So the best fit is reperfusion of the myocardium.
$$\boxed{\text{Myocardial reperfusion}}$$
The answer hinges on knowing its nickname, the reperfusion arrhythmia. When a blocked coronary artery is opened, whether by clot-busting drugs or by angioplasty, the suddenly reperfused muscle often throws up exactly this rhythm. So myocardial reperfusion is the condition most strongly tied to AIVR, making that the correct choice. Helpfully, the rhythm is benign and short lived, and its appearance after treatment of a heart attack is taken as a sign the artery is flowing again.
Looking at the alternatives, dilated cardiomyopathy tends to produce ventricular tachycardia and atrial fibrillation rather than AIVR. Digitalis poisoning is famous for atrial tachycardia with block and bidirectional ventricular tachycardia. Myocarditis can cause many rhythm and conduction problems, but none of these claims AIVR as its most typical arrhythmia.
So the best fit is reperfusion of the myocardium.
$$\boxed{\text{Myocardial reperfusion}}$$
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