[Surgical treatment of ventricular tachycardia caused by abnormal muscle band]

A 57-year-old male was introduced to our hospital for his drug resistant non-ischemic ventricular tachycardia causing faintness attack. Preoperative electrophysiological studies led to a diagnosis of ventricular tachycardia originating from the right ventricular outflow tract. After ventriculotomy, an abnormal muscle band was noticed in the right ventricular outflow tract, which seemed to be a focus of tachycardia by endocardial mapping. Myocardial excision with the abnormal muscle band was performed. In addition to, cryoablation was performed surrounding this area. After the operation, the ventricular tachycardia disappeared completely. No antiarrhythmic drug have been required at 18 months postoperative months.