Objective:Quantitative analysis was performed for cardiac troponin I(cTnI),creatine kinase(CK-MB) and myocardial myohemoglobin(Mb) so as to provide available detective index in the early diagnosis of acute myocardial infraction(AMI)and risk prediction.Methods:Mass of serum cTnI,CK-MB and Mb of 85 patients with acute coronary artery syndrome(ACS) were detected within 24h to discuss their sensitivity and specificity to AMI.Results:The spective sensitivity value of cTnI,CK-MB and Mb were 93.3%,86.7% and 78.3%;the spective specificity value were 100%,100% and 88.0%;the sensitivity and specificity value of both cTnI and Mb were 96.7% and 88.0%;the sensitivity and specificity value of all cTnI,Mb and CK-MB were 98.3% and 88.0%;the positive and negative expectative value were 95.2% and 88.0%.Conclusions:To AMI,there was most sensitive and specific to detect all of cTnI,CK-MB and Mb.cTnI was the individual risk factor by evaluating death occurrence for cardiovascular.