The purpose of the study is to proof the safety and efficacy of the new ICD sytem (Iforia/Ilesto). The devices are available with DF-1 and DF4 connection. A special focus is set on the ICD system with DF4 connection.

Inclusion Criteria:

• Patient has provided written informed consent.
• Patient has standard ICD/CRT-D indication.
• Patient accepts Home Monitoring concept.
• Patient is able to attend the planned hospital follow-up visits.
• Patient has legal capacity and ability to consent.

Exclusion Criteria:

• Patient has a standard contra-indication for ICD/CRT-D therapy.
• Age < 18 years
• Patient is pregnant or breastfeeding.
• Patient is expected to receive ventricular assist device or heart transplantation within the next 12 months.
• Life expectancy of less than 12 months.
• Participating in any other clinical study of an investigational cardiac drug or device.

Patients with standard ICD/CRT-D indication who are referred to the hospital.