This is a single-center, prospective, observational cohort study designed to investigate the association between aging-related characteristics and long-term outcomes in patients with acute myocardial infarction (AMI). Approximately 588 eligible participants will be consecutively enrolled and followed for at least 24 months. Clinical data, aging assessments, laboratory examinations, cardiac imaging, and blood samples will be collected to establish a clinical database and biobank. The study aims to identify aging-related prognostic biomarkers, develop a risk prediction model integrating clinical and aging-related indicators, and improve risk stratification and individualized management for patients with AMI.