What is Supraventricular Tachycardia?
Supraventricular tachycardia or SVT is an abnormally fast heart rhythm that is caused by abnormalities of the cardiac electrical impulse from the top chambers of the heart. The top chambers, the left atrium and right atrium, are usually activated regularly by the sino-atrial node in the right atrium. In SVT, the right and left atria are activated abnormally fast and thus cause the ventricles to also beat fast.
Causes of Supraventricular Tachycardia
The cause of SVT may be abnormal or duplicated cardiac electrical circuits in the left and right atria. Abnormal cardiac electrical tissue may have been present from birth or may have developed with age.