Ventricular tachycardia (VT) is a type of abnormal heart rhythm, or arrhythmia. The heart’s rhythm (heartbeat) is regulated by natural electrical impulses that travel through the heart muscle. These impulses tell the heart’s chambers when to contract.
Ventricular tachycardia is a dangerous type of rapid heart rhythm usually associated with poor cardiac output (blood ejected from the heart). It arises in the heart’s lower chambers (ventricles) from tissues that generate a rapid and irregular heart rhythm. Ventricular tachycardia is a life-threatening emergency that may require an electrical shock therapy called cardioversion.
Ventricular tachycardia is an abnormal heart rhythm that can be dangerous or even fatal. The normal heartbeat starts in the upper chambers of the heart, and normally ranges between 60-100 beats per minute.
Ventricular tachycardia is an abnormal heart rhythm originating in the lower chambers of the heart. It is usually much faster than the normal heartbeat, varying from 150 to 300 beats per minute. (About triple the normal heart rate.) It may cause loss of consciousness or cardiac arrest. Rarely, in patients with normal hearts, ventricular tachycardia may not cause too many problems.
Ventricular tachycardia may occur as a complication of a heart attack. It may also develop in people who have had cardiomyopathy, heart failure, heart surgery, myocarditis, valvular heart disease, or congenital heart disease, and in those who use certain medications.
The symptoms of ventricular tachycardia may include:
- Chest discomfort
- Fainting
- Lightheadedness or dizziness
- Palpitations
- Shortness of breath
People experiencing ventricular tachycardia may also lose consciousness.
VT most often arises from areas of scar tissue in the ventricle, which is the result of a heart attack. However, VT can also occur in a normal, healthy heart. Ablation can be used to treat VT in some instances. Your physician and/or nurse can discuss this possibility with you.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.