chemical ventricular defibrillation of the heart by intravenous or intracardiac administration of bretylium tosylate ( 6 to 24 mg/kg of body weight ) did not occur in any dog ( n = 30 ) given the drug 5 minutes before , immediately after , or 75 seconds after electrical induction of ventricular fibrillation .
C0006168
bretylium tosylate
C0042510
ventricular fibrillation