Clinical Outcomes After Immediate Coronary Angiography in Elderly Versus Younger Patients Suffering from Acute Coronary Syndrome.

(1) Aims: This study aimed to compare cardiovascular outcomes in patients older than 75 years with those of younger patients who underwent interventional treatment for acute coronary syndrome (ACS) at a tertiary university hospital. (2) Methods and Results: This was a retrospective, observational study conducted between January 2016 and December 2021, including 1846 consecutive patients with ACS (older than 75 years n = 203, 11%; younger than 75 years n = 1643, 89%). After admission, patients underwent coronary angiography and subsequently received percutaneous coronary intervention (PCI), coronary artery bypass grafting (CABG), or medical therapy. The mean age in the older group (O75) was 80 ± 4 years versus 59 ± 9 years in the younger group (Y75) (p < 0.001). Older patients more frequently presented with multivessel coronary disease (O75: 114 [56%] vs. Y75: 727 [44%], p = 0.004), and the left anterior descending artery (LAD) was more often the culprit vessel (O75: 105 [52%] vs. Y75: 684 [41%]). Major adverse cardio-cerebral events (MACCEs) occurred more frequently in patients older than 75 years, mainly due to higher mortality (O75: 14 [6.9%] vs. Y75: 27 [1.6%], p < 0.001) and stroke (O75: 3 [1.5%] vs. Y75: 2 [0.1%], p < 0.001). Multivessel disease was the only factor independently associated with MACCEs (HR 1.417, 95% CI 1.058-1.898, p = 0.02). The incidence of significant bleeding (Bleeding Association Research Consortium (BARC) class ≥ 3) was similar between groups (Y75: 123/1643 [7.5%] vs. O75: 13/203 [6.5%], p = 0.587). (3) Conclusions: Patients older than 75 years have worse short- and long-term prognoses following ACS compared with younger patients. Special attention and a multidisciplinary, personalized approach are required to optimize outcomes in this population.