Association Between Family History, a Genetic Risk Score, and Severity of Coronary Artery Disease in Patients With Premature Acute Coronary Syndromes

Objective—A genetic risk score (GRS) for coronary artery disease has recently been shown to be independent of family history (FHx) in predicting future cardiovascular events. We sought to determine whether the presence of these risk factors, either individually or together, was associated with a higher burden of angiographic coronary artery disease. Approach and Results—We included 763 patients with premature acute coronary syndrome (median age, 50 [46–53] years; 30.8% women) with at least 1 major epicardial vessel stenosis enrolled in the Gender and Sex Determinants of Cardiovascular Disease From Bench to Beyond in Premature Acute Coronary Syndrome (GENESIS-PRAXY) study, a multicentre prospective cohort study of premature patients with acute coronary syndrome (aged ≤55 years). The prevalence of multivessel disease (ie, ≥2 vessels with >50% stenosis) in individuals with FHx was 49.7% as compared with 37.9% in those without FHx (P<0.01 for comparison). In adjusted models for age, sex, traditional risk fact...