Stereotactic Ablative Radiotherapy for Refractory Ventricular Tachycardia

Inclusion Criteria: Documented sustained ventricular arrhythmias refractory to or not a suitable candidate for catheter based RFA ablative therapy * Documented sustained ventricular arrhythmias refractory to or not a suitable candidate for cardiac sympathetic denervation therapy * Documented ventricular arrhythmias refractory to or not a suitable candidate for cardiac transplantation * Documented sustained ventricular arrhythmias refractory to or not a suitable candidate for additional medical management * ICD in place with documented episodes recurrent VT despite best clinical management previous refusal of ICD with recurrent sustained ventricular arrhythmias * If ischemic cardiomyopathy, myocardial infarction occurred more than one month prior to enrollment * No history of prior radiotherapy to the chest * Prescribed dose must be deliverable using SABR technique * Age ≥ 18 years * Karnofsky Performance Status (KPS) \> 70 * If a woman is of childbearing potential, a negative serum pregnancy test must be documented. Women of childbearing potential must agree to use adequate contraception (hormonal or barrier method of birth control; or abstinence) for at least 4 weeks after study treatment. * Ability to understand and willingness to sign a written informed consent