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Ventricular Premature Beats

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Ventricular Premature Beats Definition

Definition

A premature ventricular beat (PVB) is an extra heartbeat caused by abnormal electrical activity. It starts in the ventricles (the lower chambers of the heart) before a normal heartbeat occurs. PVB interferes with the heart’s normal rhythm and causes a pause before the next heartbeat. It may feel like a heartbeat is skipped.

PVBs are common, especially among the elderly. They can occur in people who are healthy, in which case they are harmless. However, when they occur after a heart attack or heart surgery they can lead to dangerous heart rhythms. In some cases, these rhythms can cause sudden death. You should contact your doctor right away if you suspect you have PVBs after a heart attack or heart surgery.

Ventricular Contraction

Nucleus image
A beat (contraction) of the lower chambers of the heart.
© 2009 Nucleus Medical Art, Inc.
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