BIO|MASTER.Ilivia Family / Plexa

Inclusion Criteria: * Standard indication for ICD or CRT-D therapy according to clinical practice * De novo implantation or upgrade/exchange (group A only) from existing ICD, CRT-D or pacemaker implant * Patient is able to understand the nature of the clinical investigation and provides written informed consent * Patient is able and willing to complete all routine study visits at the investigational site * Patient accepts Home Monitoring concept * Age ≥ 18 years Exclusion Criteria: * Contraindication to ICD or CRT-D therapy, respectively * For CRT-D patients in group A only: physician not willing to activate MultiPole Pacing in the patient * Cardiac surgical procedure planned within 6 months after implantation (including also interventional procedures like ablation, valve replacement etc.). Procedures to occur during or prior to implantation are not exclusionary. * Expected to receive heart transplant or ventricular assist device within 6 months * Life expectancy less than 6 months * Participation in any other interventional clinical investigation * Pregnant or breastfeeding at time of enrollment