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Supraventricular tachycardia, often abbreviated as SVT, is a type of irregular heartbeat that originates in the upper chambers of the heart, the atria. It is characterized by a rapid heart rate, typically exceeding 100 beats per minute, and a regular rhythm. The term "supraventricular" refers to the origin of the abnormal electrical signals above the ventricles. These rapid rhythms can occur intermittently, meaning they come and go, or they can be sustained.
The underlying cause of SVT is usually an electrical short circuit or a re-entrant pathway within the
Diagnosis of SVT typically involves an electrocardiogram (ECG) to record the heart's electrical activity. Other diagnostic