Which feature is associated with Accelerated Idioventricular Rhythm?

Accelerated Idioventricular Rhythm (AIVR) is defined by a ventricular rate that typically ranges from 41 to 100 beats per minute. This differentiates it from other slower rhythms such as Junctional or Idioventricular rhythms, which involve rates below 40 bpm. In AIVR, it is common to see distinct characteristics such as the absence of P waves, but the defining feature is the accelerated rate.

This rhythm usually occurs in settings where there is increased automaticity of the ventricular pacemaker due to factors like myocardial ischemia or during the reperfusion phase of a myocardial infarction. Recognizing the rate range is crucial for appropriate management and understanding the underlying pathophysiology associated with AIVR.

The other options do not align with the established criteria for AIVR, as they either represent different rates or rhythm characteristics that do not correspond with this specific arrhythmia.