Despite implementation of new interventional techniques and therapeutic advances, elderly patients with acute coronary syndrome (ACS) continue to be susceptible to in-hospital bleeding compared with younger ones. Thus, we investigated the incidence of in-hospital bleeding events and associated risk factors in elderly (≥ 75°years) ACS patients. We also wanted to define the bleeding sites, characteristics, and associated mortality. Bleeding Academic Research Consortium (BARC) classification type 2, 3, or 5 was used to define bleeding events. Overall, 539 patients were included in the study (mean age: 82.5 ± 4.8°years; 282 (52.3%) females). Of these patients, 69 (12.8%) developed in-hospital bleeding. Factors that were independently related with in-hospital bleeding were age (odds ratio (OR): 1.08; 95% confidence interval (CI): 1.011.14, = .01), acute kidney injury (OR: 3.66; 95% CI: 2.016.69; < .01), tirofiban (OR: 4.43; 95% CI: 1.7810.99; < .01), and ticagrelor (OR: 1.93; 95% CI: 1.013.73; = .04) administration. The urinary tract was the most frequent bleeding site, followed by femoral arteries. In conclusion, ticagrelor and tirofiban should be used with caution in elderly ACS patients.
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