title: B groups and gray areas for implantable cardioverter-defibrillators: insights from the OMNI registry.
authors.forename: Michael S
authors.initials: MS
authors.lastname: Lloyd
mesh_terms: D058406:Cardiac Resynchronization Therapy; D014487:Centers for Medicare and Medicaid Services, U.S.; D017147:Defibrillators, Implantable; D005260:Female; D006333:Heart Failure / Q000628:therapy*; D006801:Humans; D008297:Male; D017063:Outcome Assessment, Health Care; D017180:Tachycardia, Ventricular / Q000628:therapy*