Older patients who receive a primary implantable cardioverter defibrillator (ICD) during acute hospitalizations may not have substantially different mortality or sudden cardiac death rates compared with those who are discharged without an ICD.
Receiving a primary ICD while hospitalized for heart failure or other acute conditions (representing approximately 40% of ICD implantations in Medicare patients) might not confer the same benefit demonstrated for patients in previous landmark trials, in which the candidates were selected in a stable outpatient setting and ICDs were received as an elective procedure.
To learn more, see Chen et al. (2015). Real world effectiveness of primary implantable cardioverter defibrillators implanted during hospital admissions for exacerbation of heart failure or other acute co-morbidities: Cohort study of older patients. BMJ, 351.