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What is supraventricular tachycardia (SVT)?

Supraventricular tachycardia (SVT) is as an irregularly fast or erratic heartbeat (arrhythmia) that affects the heart's upper chambers. SVT is also called paroxysmal supraventricular tachycardia. The typical heart beats about 60 to 100 times a minute. A heart rate of more than 100 beats a minute is called a tachycardia (tak-ih-KAHR-dee-uh).

Is SVT a life threatening condition?

Loss of consciousness (also known as syncope) during SVT is a rare occurrence. Although such symptoms may raise concern, in general, SVT is not a serious or life-threatening condition. Nonetheless, if any of these symptoms develops, immediate medical attention should be sought. How Is Supraventricular Tachycardia Diagnosed?

How do you know if you have SVT?

Signs of SVT include a racing heart rate and other symptoms that can cause discomfort, pain, or feeling faint. A cardiac monitor is used to record the heart to identify an abnormal rhythm. Treatment for SVT ranges from tips you can apply at home to procedures that can get rid of or bypass the source of this condition.

How can VT be differentiated from SVT?

Other, more complicated ECG algorithms have been developed to distinguish VT from SVT, such as the Brugada criteria, which rely on an examination of the QRS morphology in the precordial leads, 73 and the Vereckei algorithm, which is based on an examination of the QRS complex in lead aVR 74 ( Table 5 ).