Coronary Artery Aneurysms in ST-Elevation Myocardial Infarction (From a United States Based National Cohort)

Area of Science:

• Cardiology
• Vascular Medicine
• Epidemiology

Background:

• The relationship between coronary artery aneurysms (CAA) and ST-elevation myocardial infarction (STEMI) is not well understood.
• Identifying differences in patient profiles and outcomes is crucial for managing STEMI with co-existing CAA.

Purpose of the Study:

• To investigate and compare patient demographics, clinical characteristics, interventions, and mortality in patients with STEMI, stratified by the presence or absence of CAA.
• To elucidate potential differences in the underlying pathophysiology and management strategies for STEMI associated with CAA.

Main Methods:

• Retrospective analysis of the Nationwide Readmission database (2014-2018).
• Inclusion of 1,038,299 patients with STEMI, with 1,543 (0.15%) identified as having CAA.
• Comparison of primary outcome (mortality) and secondary outcomes (clinical presentation, interventions, coronary dissection) between the CAA and no-CAA groups.

Main Results:

• Patients with STEMI and CAA were younger (62.6 vs 65.4 years), more frequently male (78% vs 66%), and had a higher prevalence of prior Kawasaki disease (2.5% vs 0.01%).
• Coronary dissection was significantly more prevalent in the CAA group (73% vs 1%).
• The CAA group showed lower all-cause mortality (6.3% vs 11.7%) despite increased use of coronary artery bypass grafting, thrombectomy, and bare-metal stents.

Conclusions:

• Significant differences exist in the clinical profile, risk of coronary dissection, treatment approaches, and mortality for STEMI patients with CAA compared to those without.
• These findings underscore the need for tailored management strategies for STEMI patients with co-existing coronary artery aneurysms.