Spontaneous termination of prolonged ventricular fibrillation after acute myocardial infarction.

We describe a case of ventricular fibrillation occurring during acute myocardial infarction converting to sinus rhythm without specific additional drug therapy or direct current cardioversion. Ventricular fibrillation occurred during therapy with a temporary transvenous bipolar pacemaker and prophylactic intravenous lidocaine. Reversion of ventricular fibrillation without direct current cardioversion is unusual. Direct current shock remains the first form of treatment for witnessed ventricular fibrillation.