Inclusion Criteria:  Age ≥18 years. Symptomatic ventricular tachycardia with/without ICD and underlying ischemic No need for coronary revascularisation therapy based on coronary angiography or Cardiac MRI Class I or IIa indication for catheter ablation (according to 2015 Guidelines of the European Society of Cardiology for the management of ventricular tachycardias). Signed informed consent.  Exclusion Criteria:  Patients with ventricular assist device Reversible causes of ventricular tachycardia (e. g. thyroid disorder, acute alcohol intoxication, recent major surgical procedures, trauma or acute infection/acute myocarditis) Recent cardiovascular event including myocardial infarction, percutaneous intervention, valve or cardiac bypass surgery Previous VT ablation within the last 3 months Patients with ventricular tachycardia and known atrial fibrillation with sufficient antiarrhythmic drug therapy regarding rhythm control of atrial fibrillation Medical conditions limiting the expected survival to < 1 year On the waiting list for heart transplant. Participation in any other randomized controlled trial Women of childbearing potential without appropriate contraceptive measures (oral contraceptives, vaginal ring, intrauterine devices, implanon, injections, partner with vasectomy) Subjects under legal supervision or guardianship Unable to give informed consent