accelerated idioventricular rhythm
Pronunciation: eye-dee-oh-ven-TRIK-you-lar
Also written as: AIVR — Accelerated Idioventricular Rhythm
A ventricular escape rhythm with rate 50-100 bpm, commonly seen during reperfusion after myocardial infarction and generally benign requiring no treatment.
Full Definition
Accelerated idioventricular rhythm (AIVR) is a wide complex rhythm originating from ventricular tissue at rates between 50-100 bpm, faster than typical ventricular escape (20-40 bpm) but slower than ventricular tachycardia (>100 bpm). Most commonly observed during acute MI reperfusion, either spontaneous or after thrombolytic therapy, AIVR is generally hemodynamically well-tolerated and self-limiting. Unlike ventricular tachycardia, AIVR rarely causes hemodynamic compromise and typically does not require treatment unless the patient becomes symptomatic from loss of AV synchrony.
Usage
Usage note: Emphasize benign nature and association with reperfusion when documenting this rhythm.
In Context
- "Post-thrombolysis monitoring revealed accelerated idioventricular rhythm consistent with reperfusion." — Telemetry interpretation
- "The accelerated idioventricular rhythm was hemodynamically stable and required no intervention." — Cardiology consultation