What is the definition of Supra-ventricular Tachycardia (SVT)?

Supraventricular Tachycardia (SVT) is defined as a rapid heart rhythm that originates above the level of the ventricles, specifically in the atria or the atrioventricular (AV) node. The rhythm generally occurs at a rate of 150-350 beats per minute, which correlates directly with the chosen answer. This elevated heart rate is significantly higher than the normal heart rates found in other types of rhythms.

The characteristics of SVT often include sudden onset and termination, and it can lead to symptoms such as palpitations, dizziness, or even syncope if sustained. Recognizing the distinctive heart rate range of 150-350 bpm is critical for differentiating SVT from other arrhythmias and provides necessary information for appropriate clinical management. The definition encompasses the abnormally accelerated heart rate which is a hallmark feature of this condition.