Infarto miocardico recidivo: mortalità ospedaliera, complicazioni cardiovascolari e profili di comorbidità.

IMPORTANCE: Recurrent myocardial infarction (RMI) represents a growing clinical challenge due to advances in acute myocardial infarction (AMI) management that prolong survival yet inadvertently increase the prevalence of high-risk patients with prior infarctions. Understanding the unique trajectory and complications associated with RMI is critical for improving care. OBJECTIVE: To assess the clinical outcomes, complication rates, and comorbidity burden of patients hospitalized with recurrent myocardial infarction (RMI) compared to those with first-time AMI or NSTEMI. DESIGN, SETTING, AND PARTICIPANTS: A retrospective cohort study utilizing the Nationwide Readmissions Database (2016-2022),