Prognostic Value of Total Bilirubin in Patients With ST-Segment Elevation Acute Myocardial Infarction Undergoing Primary Coronary Intervention

Abstract

Previous studies have shown that the serum total bilirubin (TB) concentration was inversely related with stable coronary artery disease, diabetes mellitus, hypertension, and metabolic syndromes. The relation between TB levels and in-hospital and long-term outcomes in patients with ST-segment elevation myocardial infarction (STEMI) who undergo primary percutaneous coronary intervention (PCI) is not known. Data from 1,624 consecutive patients with STEMI who underwent primary PCI were evaluated. TB was measured after primary PCI, and the study population was divided into tertiles. The high TB group (n=450) was defined as a value in the upper third tertile (>0.9 mg/dl) and the low TB group (n= 1,174) as any value in the lower 2 tertiles (≤0.9 mg/dl). The in-hospital mortality rate was significantly greater in the high TB group than in the low TB group (4% vs 1.5%, p= 0.003). In the multivariate analyses, a significant association was noted between high TB levels and the adjusted risk of in-hospital cardiovascular mortality (odds ratio 3.24, 95% confidence interval 1.27 to 8.27, p= 0.014). In the receiver operating characteristic curve analysis, TB >0.90 mg/dl was identified as an effective cutpoint in patients with STEMI for in-hospital cardiovascular mortality (area under the curve 0.66, 95% confidence interval 0.55 to 0.76, p= 0.001). The mean follow-up period was 26.2 months. No differences wereseen in the long-term mortality rates between the 2 groups. In conclusion, high TBisindependently associated with in-hospital adverse outcomes in patients with STEMIwhoundergo primary PCI. However, no association was found with long-term mortality.