Supraventricular tachycardia

Overview

Supraventricular tachycardia is an abnormally fast heart rate starting above the heart's 2 lower chambers (ventricles). It's caused by abnormal circuitry in the heart, usually present at birth.

Symptoms

There may be symptoms like heart palpitations or no symptoms at all.

Treatments

Certain maneuvers, medications, or implanted devices can help slow the heart.