To the Editor: Dr Hernandez and colleagues1 make the case that implantable cardioverter-defibrillators (ICDs) are underused in certain populations as well as in certain subgroups of patients. In this analysis the authors use the outcomes of randomized trials to extrapolate to the expected use of ICDs in the patient population studied. In doing so they make a key assumption and, I think, some key errors.
Stamato NJ. Implantable Cardioverter-Defibrillators, Heart Failure, and Patient Characteristics. JAMA. 2008;299(3):285-286. doi:10.1001/jama.299.3.285-a