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Heart, section through the middle
Heart, section through the middle


Heart, front view
Heart, front view


Electrocardiogram (ECG)
Electrocardiogram (ECG)


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 ventricular contraction; Premature beats; PVC (premature ventricular contraction); Extrasystole



Causes, incidence, and risk factors:

Ectopic heartbeats are small variations in an otherwise normal heartbeat that causes an irregular pulse. They may occur without an obvious cause and are usually harmless.

Sometimes they are associated with chemical (electrolyte) problems in the blood, which need treatment. They can also happen with ischemia caused by a decrease in blood supply to the heart.

Ectopic beats may be caused or made worse by excessive smoking, alcohol consumption , caffeine , certain medications such as stimulants, and some illicit drugs.

Ectopic beats are rare in children who do not have congenital heart disease. Most extra heartbeats in children are premature atrial contractions (PACs), which are almost always benign .

In adults, ectopic beats are common. Their causes should be investigated even if it turns out that no treatment is needed.



Symptoms:

Symptoms include:

  • Feeling your heart beat (palpitations )
  • Feeling like your heart stopped or skipped a beat
  • Feeling of occasional, forceful beats

Note: There may be no symptoms.



Signs and tests:

A physical examination may show an occasional, irregular pulse, but if the ectopic beats do not occur frequently, your doctor may not detect them during a physical exam.

Blood pressure is usually normal.

The following tests may be done:



Treatment:

Most ectopic heartbeats do not require treatment. The condition is treated if your symptoms are severe or if the extra beats occur very frequently.

An underlying cause, if discovered, may also require treatment.



Support Groups:



Expectations (prognosis):

Ectopic heartbeats are generally benign, requiring no treatment. Occasionally, they may indicate an increased risk for other cardiac arrhythmias.



Complications: Note: There usually are no complications.

Calling your health care provider:

Call your health care provider if you have persistent palpitations, or palpitations with chest pain or other symptoms.

Also call your health care provider if you have this condition and your symptoms worsen or do not improve with treatment.



Prevention:

Limiting caffeine, alcohol, and tobacco may reduce the risk and frequency of ectopic heartbeats in certain people. Exercise often helps those who are inactive.



References:

Olgin JE. Approach to the patient with suspected arrhythmias. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap. 61.

Toth PP, Shammas NW, Dippel EJ, Foreman B. Cardiac electrophysiology and arrhythmias. In: Rakel RE. Textbook of Family Practice. 7th ed. Philadelphia, Pa: WB Saunders; 2007:chap. 39.




Review Date: 6/7/2008
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Linda Vorvick, MD, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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