Radiofrequency catheter ablation of idiopathic recurrent ventricular tachycardia with right bundle branch block, left axis morphology.

Idiopathic ventricular tachycardia with right bundle branch block and left axis deviation morphology is a well described clinical syndrome. Previous studies have mapped the tachycardia focus to the inferior septal region at the base of the posterior papillary muscle of the left ventricle. We describe two typical cases in a 20-year-old man and 29-year-old woman in which the tachycardia focus was localized with endocardial mapping techniques. In both cases the ventricular tachycardia focus was ablated with application of radiofrequency current at the inferior septal region. There were no complications of the procedures. The patients remain asymptomatic over follow-up of 7 and 4 months, respectively.