Premature Ventricular Complex (PVC)

A ventricular depolarization that occurs earlier than expected. It appears on the ECG as an early, wide QRS complex without a preceding related P wave. PVCs may be idiopathic or caused by stress, electrolyte imbalance, ischemia, hypoxemia, hypercapnia, ventricular enlargement, or a toxic reaction to drugs. Frequent PVCs may be a precursor of ventricular tachycardia or fibrillation. Mosby (2009-02-11). 

© Matt Dillard 2012