Ventricular Tachycardia


Ventricular tachycardia is an abnormally fast heart rate. The abnormal heart rate originates in one of the heart's lower chambers (ventricles). It is diagnosed when there are 3 or more beats in succession originating from a ventricle. The heart beats at a rate greater than 100 beats per minute, but less than 200 beats per minute. Ventricular tachycardia is considered sustained if it lasts more than 30 seconds. When this condition is sustained, the ventricles are not able to fill with enough blood for the heart to keep blood flowing properly through the body. This can result in lowered blood pressure, heart failure , and death.
Heart Chambers and Valves
heart anatomy
Copyright © Nucleus Medical Media, Inc.


Damage to the ventricles can cause ventricular tachycardia. This damage to the heart muscle may be due to conditions like a heart attack or cardiomyopathy .

Risk Factors

Factors that may increase your chance of ventricular tachycardia include:
  • Coronary artery disease (CAD)
  • History of heart attacks
  • Heart abnormalities, such as cardiomyopathy, mitral valve prolapse , valvular heart disease, or ion channel disorders
  • Diagnosis of electrical instability
  • Sarcoidosis
  • Beginning treatment for hypothyroidism
  • Use of certain medications, such as antipsychotics or anti-arrhythmic drugs
  • Extreme physical or emotional overstimulation
  • Low oxygen levels in the blood
  • Very high levels of acid in bodily fluids
  • Stimulants, such as caffeine, alcohol , or cocaine
Coronary Artery Disease
Coronary Artery plaque
Copyright © Nucleus Medical Media, Inc.

leave comments
Did you like this? Share with your family and friends.
Related Topics:
Current Research From Top Journals

Music May Improve Sleep Quality in Adults with Insomnia
October 2015

Insomnia can make your days miserable and a cure can be hard to find. There are some medications but there is some worry with side effects and the potential for addiction. Music is side effect free and according to this study may help you find sleep.

dot separator
previous editions

CPAP May Help Older Adults with Obstructive Sleep Apnea
September 2015

Water Before Meals May Promote Weight Loss
August 2015

Fecal Transplants Induce Ulcerative Colitis Remission
July 2015

dashed separator


Our Free Newsletter
click here to see all of our uplifting newsletters »