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Since the number of elderly patients suffering from acute myocardial infarction (AMI) has been increasing in developed countries, primary percutaneous coronary intervention (PCI) for the very elderly aged ≥80 years old is already common. The study aimed to examine the determinants of in-hospital death among the very elderly with AMI in current PCI era. We included 412 consecutive AMI patients aged ≥ 80 years old who received PCI to the culprit lesion; however, 42 patients (10.2%) died during the index hospitalization. Thus, univariate and multivariate logistic regression analyses were performed to identify the determinants of in-hospital death. Of note, the modified KATZ index, which is a seven-point scale ranging from 0 to 6 (0 point indicating no dependence and six points indicating full dependence), was calculated to evaluate pre-admission activity of daily living (ADL). In multivariate analysis, cardiac arrest (OR 4.642, 95% CI 1.177-18.305, P = 0.028), Killip class IV (versus Killip class I: OR 5.732, 95% CI 1.076-16.630, P = 0.001), modified KATZ index (OR 1.212, 95% CI 1.001-1.469, P = 0.049), hemoglobin levels (OR 0.803, 95% CI 0.656-0.983, P = 0.033), use of temporary pacemaker (OR 2.603, 95% CI 1.010-6.709, P = 0.048), final Thrombolysis In Myocardial Infarction (TIMI) flow grade 3 (versus TIMI ≤ 2: OR 0.240, 95% CI 0.093-0.618, P = 0.003), and mechanical circulatory support (OR 4.264, 95% CI 1.818-10.005, P = 0.001) were found to be significantly associated with in-hospital death. In conclusion, in-hospital outcomes of the very elderly with AMI were still poor in the current PCI era. Poor pre-admission ADL as well as cardiogenic shock and anemia were determined to be strongly associated with in-hospital death.

Determinants of In-Hospital Death Among the Very Elderly with Acute Myocardial Infarction