Ventricular tachycardia is a condition in which the lower chambers of your heart (ventricles) beat very quickly. Ventricular tachycardia is a type of tachycardia, a condition in which your heart beats quicker than normal because of a problem in your heart's electrical system.

In ventricular tachycardia, your heart may not be able to pump enough blood to your body and lungs. Ventricular tachycardia may lead to a condition in which your lower heart chambers quiver (ventricular fibrillation), which may cause your heart to stop (cardiac arrest) and lead to death if not treated immediately.

Nov. 20, 2012