Abstract
A 38 year old woman with a structurally normal heart presented with near syncope and had right ventricular outflow tract tachycardia. She was intolerant of antiarrhythmic medication and underwent low energy catheter ablation. Six non-arcing shocks of 25 J were delivered to the right ventricular outflow tract. No further ventricular tachycardia occurred during a follow up of seven months without antiarrhythmic treatment.