SD01 Registry (SD01 ICD Lead)

Inclusion Criteria: * Meet a standard indication for ICD/CRT-D therapy * First ICD/CRT-D implantation or upgrade from pacemaker * Signed informed consent form * Willing to participate for the whole duration of the registry * Patient accepts Home Monitoring concept and is able to activate and use the Cardiomessenger * Patient has legal capacity and ability to consent Exclusion Criteria: * Meet a standard contraindication for an ICD/CRT-D therapy * Age \<18 years * Pregnant or breast-feeding women * Cardiac surgery planned within the next six months * Enrollment in another cardiac clinical investigation with active treatment arm * Mechanical tricuspid valve prosthesis or severe tricuspid valve disease * Dexamethasone acetate intolerance