title: Defibrillators decrease/increase risk of death.
mesh_terms: D002303:Cardiac Output, Low / Q000401:mortality* / Q000628:therapy; D016757:Death, Sudden, Cardiac / Q000517:prevention & control*; D017147:Defibrillators, Implantable / Q000009:adverse effects; D018450:Disease Progression; D006801:Humans