RESEARCH. Temporal trends in revascularization and outcomes after acute myocardial infarction among the very elderly

Pagé, Maude; Doucet, Michel; Eisenberg, Mark J.; Behlouli, Hassan; Pilote, Louise
September 2010
CMAJ: Canadian Medical Association Journal;9/21/2010, Vol. 182 Issue 13, p1415
Academic Journal
Background: Few data are available on time-related changes in use and outcomes of invasive procedures after acute myocardial infarction in very elderly patients. Our objective was to describe trends in revascularization procedures and outcomes in a provincial cohort of very elderly patients who had experienced acute myocardial infarction. Methods: We used a database of hospital discharge summaries to identify all patients aged 80 years or older admitted for acute myocardial infarction in Quebec. We used the provincial database of physicians' services and medication claims to assess treatment and obtain data on survival. Results: Between March 1996 and March 2007, 29 750 patients aged 80 years or older were admitted to hospital for acute myocardial infarction. During this period, use of percutaneous coronary interventions increased from 2.2% to 24.9%, and use of coronary artery bypass graft surgery increased from 0.8% to 3.1%. Evidence-based prescriptions of medication increased over time (p < 0.001). The prevalence of reported comorbidities was higher during the period of 2003-2006 than during the 1996-1999 period. One-year mortality improved over time (46.5% for 1996-1999 v. 40.9% for 2003-2006, p < 0.001) but remained unchanged in the subgroup of patients who did not undergo revascularization. Interpretation: The use of revascularization, especially percutaneous coronary interventions, in the very elderly after acute myocardial infarction has been growing at a rapid pace, while the prevalence of reported comorbidities has been increasing in this population. Revascularization procedures are no longer restricted to younger patients. In the context of an aging population, it is imperative to determine whether these changes in practice are cost-effective.


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