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Ventricular Tachycardia   (Spanish Version)  

Definition:

Ventricular tachycardia (VT) is a rapid heartbeat that starts in the ventricles.



Alternative Names:

Wide-complex tachycardia; V tach; Tachycardia - ventricular



Causes, incidence, and risk factors:

Ventricular tachycardia is a pulse rate of more than 100 beats per minute, with at least three irregular heartbeats in a row.

The condition can develop as an early or late complication of a heart attack. It may also occur in patients with:

Ventricular tachycardia can occur without heart disease.

Scar tissue may form in the muscle of the ventricles days, months, or years after a heart attack. This can lead to ventricular tachycardia.

Ventricular tachycardia can also be caused by:

  • Anti-arrhythmic medications
  • Changes in blood chemistry (such as a low potassium level)
  • Changes in pH (acid-base)
  • Lack of enough oxygen

"Torsade de pointes" is a form of ventricular tachycardia that is often due to congenital heart disease or the use of certain medications.



References:

Olgin JE, Zipes DP. Specific Arrhythmias: Diagnosis and Treatment. In: Libby P, Bonow RO, Mann DL, Zipes DP. Libby: Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 8th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 35.
Review Date: 5/15/2008
Reviewed By: Alan Berger, MD, Assistant Professor, Divisions of Cardiology and Epidemiology, University of Minnesota, Minneapolis, MN. Review provided by VeriMed Healthcare Network. 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 physician 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. Copyright 2003 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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