Background: Serum uric acid (SUA) has been correlated with cardiac morbidity and mortality. However, its prognostic value in acute ST-segment elevation myocardial infarction (STEMI) is still uncertain. The aim of this study was to evaluate the prognostic value of SUA on admission in patients with STEMI undergoing primary percutaneous coronary intervention (PPCI).Methods: We prospectively enrolled 150 STEMI patients underwent PPCI. The mean age of the studied population was 56.1 years, 78%？were males？while 22% were females. Patients were divided into tertiles based on the basal serum uric acid level. Patients with high SUA (n= 72) was defined as a value in the third tertile (>6.4 mg/dl), and a low SUA group (n=78) was set as a value in the lower two tertiles (<6.4 mg/dl). Clinical characteristics, angiographic findings, echocardiographic data, in-hospital and three-month outcomes of PPCI were analyzed.Results: SUA level on admission carried prognostic value in patients with STEMI undergoing PPCI where the low uric acid group had better KILLIP class (P=0.001), better TIMI flow (P
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