Comparison of clinical outcomes between octogenarians and non-octogenarians with acute myocardial infarction in the drug-eluting stent era: Analysis of the Korean Acute Myocardial Infarction Registry

Background and purposeOctogenarians (age≥80 years) with coronary artery disease constitute a high-risk group. However, octogenarian patients with acute myocardial infarction (AMI) in the drug-eluting stents (DES) era have not been widely reported. We aimed to identify clinical outcomes in octogenarian compared with non-octogenarian AMI patients.Methods and subjectsWe retrospectively analyzed 9877 patients who underwent percutaneous coronary intervention (PCI) with drug-eluting stents (DES) and who were enrolled in the Korean Acute Myocardial Infarction Registry (KAMIR). They were divided into 2 groups, octogenarians (n=1494) and non-octogenarians (n=8383), in order to compare the incidence of 1-year all-cause death and 1-year major adverse cardiac events (MACE), where MACE included all-cause death, recurrent myocardial infarction, target vessel revascularization (TVR), target lesion revascularization (TLR), and coronary artery bypass grafting (CABG).ResultsThe clinical status was significantly inferior in octogenarians compared to non-octogenarians: Killip class≥II (34.8% vs. 22.5%, p