Optimal medical therapy after percutaneous coronary intervention in very elderly patients with coronary artery disease.

Background: It is still unclear whether optimal medical therapy (OMT) after percutaneous coronary intervention (PCI) has beneficial effects on long-term clinical outcomes in patients aged ≥80 years with coronary artery disease (CAD).

Methods: This study analyzed the time to the first major adverse clinical event including death or nonfatal myocardial infarction (MI), for up to 3 years after PCI using multicenter registry data. Data for 1056 patients aged > 80 years successfully treated with PCI were included in the analysis. OMT was defined as a combination of antiplatelet drug, statin, beta-blocker, and angiotensin-converting enzyme inhibitor/angiotensin II receptor blocker.

Results: In total, 204 (19%) patients in this study received OMT and 852 (81%)　received sub-OMT. During a median follow-up of 725 days, adverse clinical events occurred in 183 patients (death, n=177; nonfatal MI, n=6). Kaplan-Meier analysis showed that patients who received OMT had a lower probability of adverse clinical events than those who received sub-OMT (p<0.01, log-rank test). Propensity score matching yielded 202 patient-pairs treated with OMT or sub-OMT, in whom 64 adverse clinical events (death, n=56, nonfatal MI, n=4) occurred during follow-up. OMT remained significant in the reduction of the risk of adverse clinical events in a multivariate Cox proportional hazards model (hazard ratio 0.44; 95% confidence interval 0.26-0.75; p=0.003).

Conclusions: OMT after PCI was associated with significantly fewer adverse clinical events, including all-cause death and nonfatal MI, in patients aged ≥ 80 years with CAD. OMT might be safe and effective for these very elderly patients.