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Definition of Supraventricular tachycardia

Supraventricular tachycardia: Abbreviated SVT. A regular, abnormally fast heart beat (tachycardia) caused by rapid firing of electrical impulses from a focus above the atrioventricular node (A-V node) in the heart. Called supraventricular because the tachycardia originates above the ventricles of the heart.

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/14/2012

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