Prognostic Factors and Outcomes in Young Patients With Presented of Different Types Acute Coronary Syndrome.

The prevalence of coronary artery disease is increasing in young adults. We evaluated the outcomes of different types of acute coronary syndrome in 917 patients undergoing coronary angiography aged ≤45 years. Male sex, smoking, dyslipidemia were the most important risk factors. ST-elevation myocardial infarction (STEMI; 54.8%) predominated. The STEMI patients had higher risk of hospital mortality (3.6% vs 0.6%; P = .004) and major adverse cardiac and cerebrovascular events (MACCE; 13.8% vs 3.3%; P < .001, hazard ratio [HR], 4.65; 95% CI, 2.45-8.82). Presentation heart rate, blood pressure, heart failure, shock, arrhythmia, ejection fraction (EF), diabetes, contrast-induced nephropathy (CIN), and elevated troponin were associated with hospital mortality and MACCE. But only heart failure (HR, 5.816; 95% CI, 2.254-15.008) and CIN (HR, 6.241; 95% CI, 2.340-16.641) were independent risk factors for hospital MACCE. There was no difference in long-term mortality between the 2 groups, but non-STEMI patients had higher risk for MACCE after 3 years (14.4% vs 9.9%, P = .033). Although shock (HR, 0.814; 95% CI, 0.699-0.930), Killip class ≥2 (HR, 0.121; 95% CI, 0.071-0.170), CIN (HR, 0.323; 95% CI, 0.265-0.380), and EF (HR, 0.917; 95% CI, 0.854-0.984) were independent predictors of hospital death, only EF was the independent predictor of long-term mortality (HR, 0.897; 95% CI, 0.852-0.944).