Methods: the cross-sectional descriptive study was conducted 145 elderly patients (≥ 60 years old) who underwent percutaneous coronary intervention for left main coronary arterty stenosis (≥ 50% of lumen) from July 1, 2019 to June 30, 2020 at the Department of Interventional Cardiology, Cho Ray Hospital Results: In total, 145 elderly patients (mean age 70.7 ± 6.9 years) were enrolled, of whom 56 (38.6%) had stable angina, 11 (7.6%) had ST-elevation myocardial infarction, 65 (44.8%) had non-ST-elevation myocardial infarction and 13 (9%) had unstable angina.