Patients with previously failed conventional RF catheter ablation will be randomized to radiosurgery (active treatment group) or repeated catheter ablation (control treatment group). Details on inclusion and exclusion criteria are provided below.~Randomization Eligible patients will be assigned to 2 treatment arms - radiosurgery (active arm) or repeated catheter ablation (control arm) in 1:1 fashion by covariate-adaptive randomization algorithm considering age, gender, etiology of structural heart disease (SHD), left ventricular (LV) ejection fraction, and serum B-type natriuretic peptide (NT-proBNP) level.
A multicentre trial on clinical effects of radiosurgical ablation of ventricular tachycardia (VT).