Focal right ventricular tachycardia originating from the subtricuspid septum.

Ventricular tachycardia originating from the right ventricular septum is very uncommon. In a 54-year-old male patient with right ventricular tachycardia, the focus of the ventricular tachycardia was localized to the subtricuspid septum of the right ventricle, which could be successfully eliminated with radiofrequency catheter ablation. The patient's echocardiogram and coronary angiogram were normal. The available literature on idiopathic right ventricular tachycardia is reviewed.