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What is supraventricular tachycardia?

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In brief: Supraventricular tachycardia

There are different types of supraventricular tachycardia (SVT) and most are caused by one or more extra electrical pathways in your heart, between the atria and the ventricles.
This allows electrical impulses to ‘short-circuit’ and re-enter your atria instead of going to your ventricles. This means that the impulses end up travelling around your heart in a circle.


SVT can make your heart beat very quickly, possibly 250 beats per minute or more. Attacks of SVT may only last for a few seconds but can last for several hours or, rarely, days.

In brief: Supraventricular tachycardia

There are different types of supraventricular tachycardia (SVT) and most are caused by one or more extra electrical pathways in your heart, between the atria and the ventricles.
This allows electrical impulses to ‘short-circuit’ and re-enter your atria instead of going to your ventricles. This means that the impulses end up travelling around your heart in a circle.


SVT can make your heart beat very quickly, possibly 250 beats per minute or more. Attacks of SVT may only last for a few seconds but can last for several hours or, rarely, days.
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Dr. Tonga Nfor
Board Certified, Internal Medicine - Cardiology
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