What is the regularity of the rhythm in Accelerated Idioventricular Rhythm?

In Accelerated Idioventricular Rhythm (AIVR), the rhythm is characterized by a regular pattern of ventricular contractions that typically occurs at a rate between 40 to 100 beats per minute. This regularity is attributed to the fact that AIVR originates from the ventricles, specifically when an intrinsic pacemaker, usually the ventricular tissue, takes over for the slower-than-normal sinus node firing. Since the intervals between the QRS complexes remain consistent, the rhythm is classified as regular.

The predictable timing of each beat leads to a steady pattern, which is crucial for distinguishing it from other rhythms that may exhibit irregularities. In clinical practice, recognizing the regularity of AIVR can help in differentiating it from other arrhythmias that may present similarly but do not maintain a consistent interval between beats. This understanding is essential for proper diagnosis and management of the condition.