Septal Positioning of Ventricular Implanted Cardioverter Defibrillator (ICD) Leads

Inclusion Criteria: * Age \>=18 years * Signed written informed consent * Approved indication for implantation of ICD / CRT-D device Exclusion Criteria: * Preexisting transvenous RV pacemaker or ICD leads * Pacemaker dependency without sufficient intrinsic rhythm (≤ 30min-1) * Hypertrophic obstructive cardiomyopathy * Presence of intra-aortic balloon pump * Inotropic drug (not digitalis) necessary for hemodynamic support * Inability to perform VF induction testing due to anticipated high risk * Condition likely to limit cooperation * Unable to give informed consent * Pregnancy or planned pregnancy in the next 6 months * Patients with planned cardiac surgery within the next 3 months following randomization * Patient is currently participating in a clinical investigation that includes an active treatment arm. * Acute myocardial infarction within the previous 4 weeks.