Accelerated Idioventricular Rhythm

Slow ventricular tachycardia is also known as an “accelerated idioventricular rhythm” or “AIVR” and is a common rhythm after an MI. An idioventricular rhythm — not accelerated — has a heart rate of < 60 beats per minute.

AIVR is hemodynamically stable, and thus no specific treatment is needed. This rhythm meets all of the ACC/AHA and Brugada Criteria for ventricular tachycardia except the heart rate is < 100 beats per minute, hence the term “slow ventricular tachycardia” is commonly used. AV dissociation may be seen similar to ventricular tachycardia. Below are 12-lead ECG examples of an accelerated idioventricular rhythm: