What is ventricular tachycardia?
By:
Updated: July 28, 2010
What is ventricular tachycardia?
(VT) An electrical heart rhythm disturbance that originates in the lower chambers and occurs when the heart beats too frequently at rest. VT is characterized by a rapid heart rhythm during which patients may feel faint or dizzy, or even pass out. During VT, the heart does not pump blood as efficiently as it does during a normal rhythm, and rapid contractions prevent the ventricles from filling adequately with blood between beats. VT often progress to VF (cardiac arrest).
