Ventricular Tachycardia
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Updated: July 28, 2010
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).
