What is the typical heart rate range for Idioventricular Rhythm (IVR)?

Idioventricular Rhythm (IVR) is characterized by a heart rate that typically falls within the range of 30-40 beats per minute. This arrhythmia occurs when the normal conduction pathways are disrupted, causing the ventricles to generate their own intrinsic electrical impulses. As a result, the ventricular pacemaker takes over, usually at a slower rate than the normal sinus rhythm.

This lower heart rate is significant because it reflects the fact that IVR is a form of escape rhythm, which typically arises when higher pacemakers, such as the sinoatrial (SA) node or atrioventricular (AV) node, fail. The heart's ability to maintain an adequate cardiac output and circulation can be compromised at this reduced rate, making it a critical rhythm to recognize in clinical settings.

Understanding this typical heart rate range helps in diagnosing and managing patients presenting with IVR, as it indicates the need for further evaluation and possible interventions if symptoms of reduced cardiac output are present.