Recent studies show that, Inflammation plays an important role in the initiation and progression of atherosclerosis and in the pathogenesis of acute cardiovascular events. There is a possible association between ventricular dysfunction following acute myocardial infarction and high Sensitivity C-reactive protein (HS-CRP) and uric acid. In this study we assessed the relationship between HS-CRP and uric acid with LVEF and Killip Class in patients with acute myocardial infarction (AMI). In a cross sectional study, 188 patients (63 females and 125 males) with AMI (STEMI) who were admitted in CCU ward in Emam Khomeini Hospital, Tehran/Iran, were entered. Uric acid and HS-CRP were measured within first day of admission. We measured ejection fraction (LVEF) and used Killip classification system. The mean age of patients was 60.4±9.2 years. The mean of uric acid was 5.9±1.6, 6.6±2.1, 7.1±2.1 and 9.4±1.3 in patients with Killip Class I, II, III and IV, respectively (P=0.005). The mean of HS-CRP was 1.9±1.4, 14.2±10.9, 12.2±10.9 and 15.7±6.7 in patients with Killip Class I, II, III and IV, respectively (P=0.005). There was a relationship between HS-CRP and LVEF (Correlation coefficient= -0.788, P