ProMRI PROVEN Master Study

Inclusion Criteria: * Written informed consent * Able and willing to complete MRI testing * Able and willing to activate and use the Cardio Messenger * Able and willing to complete all testing required by the clinical protocol * Available for all follow-up visits at the investigational site * Standard indication for single, dual, or triple chamber ICD or CRT-P. * ICD or CRT-P system to be implanted in the pectoral region * Patient body height ≥ 140 cm * Age ≥ 18 years Exclusion Criteria: * Standard contraindication for single, dual, or triple chamber ICD or CRT-P. * Systems with an atrial lead: The patient has persistent (lasting longer than 7 days or requiring cardioversion) or permanent atrial arrhythmia * Patient has other medical implants that may interact with MRI, e.g. abandoned pacemaker/ICD leads, lead extensions, mechanical valves, other active medical devices, non-MRI compatible devices * Patient has other metallic artifacts / components in body that may interact with MRI * Life expectancy of less than eight months * Cardiac surgery in the next eight months * Pregnant or breastfeeding * Enrolled in another non-observational cardiac clinical investigation