Patient outcomes were collected anthropometric indices, blood pressure, blood lipid profile, ECG; blood taken 4 times (the new hospital, 6 hours, 24 hours after admission, 7 days after chest pain) to measure the concentration of biological markers: TnICK, CK-MB, LDH Xu data analysis using SPSS software 15.0, drawing curves and area under the ROC curve, calculated the sensitivity, specificity in the diagnosis of myocardial infarction.