Mayo Clinic Cardiac Implantable Electronic Device MRI Registry

Inclusion Criteria: * Strong clinical indication for MRI; in the clinical setting where MRI is the diagnostic modality of choice for a specific disease state without acceptable alternative imaging technology * Male or Female * 18 years of age or older * Able to provide informed consent * Presence of CIED Exclusion Criteria: * Presence of metallic objects that represent a contraindication to MR imaging, including: MRI-unsafe intra-orbital or intra-ocular retained metal fragments, and MRI-unsafe intracranial vascular clips and coils, other MRI-unsafe devices * Morbid obesity (abdominal diameter greater than 60 centimeters) which results in contact wiht the magnet bore. * Pregnant at time of scanning Pacemaker or Implanted Cardiac Device that is labeled as MRI-Conditional (approved by the Food and Drug Administration for exposure to MRI) * Pacemaker dependent and either: 1) device implanted before 2005, or 2) advisory pulse generator that may lower outputs in the setting of radiofrequency currents