Ectopic heartbeat

Injury	Disease	Nutrition	Poison

Symptoms	Surgery	Test	Special Topic

Heart, section through the middle

Heart, front view

Electrocardiogram (ECG)

Ectopic heartbeat

Definition:

Ectopic heartbeat is an irregularity of the heart rate and heart rhythm involving extra or skipped heartbeats.

Alternative Names:
PVB (premature ventricular beat); Premature contraction; Premature beats; PVC (premature ventricular contraction); Extrasystole
Causes, incidence, and risk factors:

Ectopic heartbeats are an arrhythmia involving small variations in an otherwise normal heartbeat. In many cases, they may occur without obvious cause and be benign.

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Other times, however, they are associated with electrolyte abnormalities in the blood which should be corrected. They can also be associated with ischemia, or local reduction in blood supply to the heart. In addition, ectopic beats may be caused or aggravated by excessive smoking, alcohol consumption, caffeine, certain medications, and some illicit drugs.

Ectopic beats are rare in children other than those with congenital heart disease. The majority of extra heartbeats in children are PAC's (premature atrial contractions), which are almost always benign.

In adults, ectopic beats can occur more commonly, and underlying reversible reasons should be investigated even if it turns out that no treatment is ultimately needed.