In Supraventricular Tachycardia (SVT), what is the minimum heart rate typically observed?

In Supraventricular Tachycardia (SVT), the hallmark characteristic is a rapid heart rate that occurs due to an abnormal electrical circuit in the upper chambers of the heart. The minimum heart rate typically observed in SVT is around 150 beats per minute. This threshold is significant because heart rates below this value are generally considered to be more consistent with other types of tachycardias or less severe arrhythmias.

Reaching a heart rate of 150 beats per minute indicates a sustained and abnormal reentrant circuit or a similar mechanism, which classifies the rhythm as SVT. Rates can certainly exceed this figure, but the diagnosis of SVT relies on identifying rates at or above this threshold as a defining feature of the condition. Therefore, recognizing that a minimum heart rate of 150 beats per minute aligns with the typical presentation of SVT is crucial for accurate diagnosis and appropriate management.