53 patients, between the ages of 14 and 76 years, presented a ventricular tachycardia which was treated by the fulguration method. 19 resulted from a complication of an old myocardial infarction, 15 from a right arrhythmogenic ventricular dysplasia, 8 from a dilated myocardiopathy. 10 patients presented idiopathic tachycardias: 3 originated in the infundibulum of the right ventricule and 7 from the left ventricle. One case originated from a surgical scar of the infundibulum. These tachycardias were continuous or occurred daily in half of the cases, or presented monthly recurrences. 1 to 17 shocks were delivered at each session, 143 on the right, 112 on the left and 2 transseptal. Four patients died from haemodynamic deterioration prior to the shock. The other 49 patients are considered as clinical successes. Three died within the first three months of low cardiac output without any recurrence of the tachycardia. 26 did not longer present any recurrent tachycardia and were not given any preventive anti-arrhythmic treatment. 19 developed recurrence or could be triggered off again, but the anti-arrhythmic medications which were ineffective, become effective. One female patient again developed slavos of ventricular tachycardia after a few months. Seven patients died 4 to 18 months after fulguration, and three presented a sudden death. They belong to the group with medically treated recurrences. This technique is a major factor in the therapeutic strategy of ventricular tachycardias, either used alone or associated with a pharmacological treatment.