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All about supraventricular tachycardia causes of supraventricular tachycardia symptoms of supraventricular tachycardia diagnosis of supraventricular tachycardia treatment for supraventricular tachycardia arrhythmias (abnormal heart rhythms) {bundle branch block cardiac arrhythmia atrial fibrillation atrial flutter supraventricular tachycardia sick sinus syndrome ventricular arrhythmias ventricular tachycardia ventricular fibrillation heart block Brugada syndrome long QT syndrome short QT syndrome Wolff-Parkinson-White syndrome (WPW syndrome)}

What causes supraventricular tachycardia?

Supraventricular tachycardia (SVT) is often caused by having extra electrical circuits in the heart. It may also be caused by valve disease or blockage of the arteries. Thyroid disease or heart failure may also cause this problem. Other causes may be drinking too much alcohol, smoking, or drinking too much caffeine, such as in coffee or soda.. Using too much cold

medicine may also cause SVT. Stress may cause you to have a SVT attack.

The normal heartbeat is synchronised by a collection of muscle fibres in the upper right chamber of the heart called the sinoatrial node. This is the heart's natural pacemaker. In SVT, fast impulses start up elsewhere, above the ventricles and override the natural pacemaker. The term SVT refers to several different kinds of arrhythmias. The most common is Paroxysmal Supraventricular Tachycardia (PSVT). The paroxysm (temporary episode of disturbance of heart rhythm) are most commonly is caused by a short circuit in the electrical system of the heart, which causes the electrical signal to continuously travel around in a circle, forcing the heart to beat rapidly.

Another specific type of SVT includes Wolff-Parkinson-White syndrome, where there is an abnormal electrical connection between the atria and ventricles. This extra tissue forms a short circuit between these chambers, again causing a fast heart beat. In SVT the heart beats so fast that the heart muscle doesn’t relax between contractions, this reduces the amount of blood being pumped around the body. Supraventricular tachycardia may be a side effect of medications such as digitalis, asthma medications, herbal supplements and cold remedies. Caffeine and stress can also cause arrhythmias.

In some cases, the cause of supraventricular tachycardia is unknown.

More information on supraventricular tachycardia

What is supraventricular tachycardia? - Supraventricular tachycardia (SVT) is a disturbance of heart rhythm as a result of rapid electrical activity of the upper parts of the heart.
What causes supraventricular tachycardia? - Supraventricular tachycardia (SVT) is caused by having extra electrical circuits in the heart. Other causes may be drinking too much alcohol, smoking.
What're the symptoms of supraventricular tachycardia? - Paroxysmal supraventricular tachycardia can cause a number of symptoms. Symptoms can come on suddenly and may go away by themselves.
How is supraventricular tachycardia diagnosed? - Diagnosis of supraventricular tachycardia can be confirmed and other causes of a fast heart rate ruled out by using an electrocardiogram (ECG) during an episode of SVT.
What's the treatment for supraventricular tachycardia? - Treatment of supraventricular tachycardia depends on its type and cause. Treatment for supraventricular tachycardia focuses on decreasing heart rate.
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All information is intended for reference only. Please consult your physician for accurate medical advices and treatment. Copyright 2005,, all rights reserved. Last update: July 18, 2005