Aim To assess the predictive value of coronary angiography TIMI myocardial perfusion grade(TMPG),electrocardiogram(ECG) single-lead ST segment resolution(STR),ECG max-ST-segment deviation(MaxSTE) and echocardiography on judging myocardial reperfusion after primary angioplasty in the patients with acute myocardial infarction(AMI).Methods PCI was performed in 50 patients within 12 hours after AMI onset.Coronary angiography,ECG and echocardiography were done before or after angioplasty.TMPG,ECG single-lead STR,MaxSTE and echocardiography were used to assess myocardial reperfusion after PCI.Myocardial perfusion scan was examined in all the patients using 99mTc-MIBI SPECT on day 7±2.Results Compared with the level of myocardial perfusion demonstrated in myocardial scan of 99mTc-MIBI SPECT,the sensitivity,specificity and accuracy of TMPG,single-lead STR,MaxSTE and echocardiography were calculated.The sensitivity of TMPG,Single-lead STR,MaxSTE and echocardiography was 94.7%,89.5%,84.2% and 78.9%,respectively;the specificity of those was 16.7%,83.3%,83.3%,83.3%,respectively;the accuracy was 76.0%,88.0%,84.0% and 80.0%,respectively.The findings in single-lead STR,MaxSTE and echocardiography match well with the results of myocardial scan of 99m Tc-MIBI SPECT.Conclusion PCI,ECG and echocardiography are effective methods to assess myocardial reperfusion in the patients suffering from AMI.