Plexa ICD Lead Registry

Inclusion Criteria: * Successfully implanted with a BIOTRONIK ICD or CRT-D compatible system along with the Plexa lead no more than 30 days prior to consent * Able to understand the nature of the registry and provide informed consent * Available for follow-up visits on a regular basis at the study site for the expected 5 years of follow-up * Accepts BIOTRONIK Home Monitoring® concept * Age greater than or equal to 18 years Exclusion Criteria: * Enrolled in any investigational cardiac device trial * Enrolled in BIOTRONIK's QP ExCELs lead study * Planned cardiac surgical procedures or interventional measures within the next 6 months * Expected to receive heart transplantation or ventricular assist device within 1 year * Life expectancy of less than 1 year * Patients reporting pregnancy at the time of enrollment