From JAMA: Over 20 percent of patients who receive an AICD[] fall out of established guidelines, ultimately facing a higher risk of death than those who properly are not treated with such a medical device. Although the study, published in this week’s edition, is of a retrospective design, it still does provide compelling data on the use of such devices, tracked by a national registry mandated by the federal government.
When the Centers for Medicare & Medicaid Services announced their expanded coverage for ICD implantation for the primary prevention of sudden cardiac death in January 2005, the agency mandated that data on all such implants in Medicare beneficiaries be entered into a national ICD Registry.
Tracked patients who received a device also tended to be sicker, carrying more chronic cardiac disease and other illnesses at time of implantation.
[P]atients who received a non–evidence-based ICD were more likely to have heart failure, atrial fibrillation or flutter, ischemic heart disease, cerebrovascular disease, chronic lung disease, diabetes, and end-stage renal disease. In addition, patients who received a non–evidence-based ICD were more likely to belong to a racial minority group (other than black) and to receive a dual-chamber ICD.
Finally, those patients who were implanted most appropriately were those most likely to have had the procedure performed by electrophysiologists — cardiologists specifically trained in all things AICD. The rate of appropriateness was statistically significant among those with this level of certification as opposed to non-EPS trained cardiologists. In previous studies, researchers had examined underuse of the devices and found that many patients who could benefit from the defibrillators did not get them. This study, obviously, looks at the converse — and provides interesting results in the process. PDF LINK