Ventricular fibrillation:An abnormal and irregular heart rhythm in which there are rapid uncoordinated fluttering contractions of the lower chambers (ventricles) of the heart.Ventricular fibrillationdisrupts the synchrony between the heartbeat and thepulsebeat.Ventricularfibrillationis commonly associated with heart attacks and scarring of theheart musclefrom previous heart attacks. Ventricular fibrillation is life threatening.
