What heart rate classification is seen in idioventricular rhythm?

• A. Regular rate of 60-100 bpm
• B. Less than 40 bpm
• C. Between 40 and 60 bpm
• D. Above 100 bpm

Answer: (B)

The heart rate classification observed in idioventricular rhythm typically falls below 40 beats per minute. Idioventricular rhythm is characterized by an intrinsic ventricular pacemaker taking control, often in response to the failure of higher pacemakers such as the sinoatrial node. This compensatory mechanism results in a slower heart rate, usually ranging from about 20 to 40 bpm. Such a low heart rate is significant in the context of clinical assessment and often indicates an underlying issue such as myocardial infarction or other cardiac dysregulation. Understanding this is crucial for healthcare professionals when evaluating a cardiac patient, as it helps guide further diagnosis and management strategies.