Objective:To analyze the prognostic value of QTc in electrocardiogram and related indicators in patients with non-ST-segment elevation myocardial infarction(NSTEMI).Methods:106 patients with NSTEMI were selected as the research subjects.They were divided into poor prognosis group(n=41)and good prognosis group(n=65)according to the prognosis at 3 months after treatment.Univariate or multivariate Logistic regression analysis was conducted to identify factors affecting the prognosis of NSTEMI pa-tients,the ROC curve analyzed the prognostic value of dynamic electrocardiogram indicators for NSTEMI patients.Results:Univariate a-nalysis showed that the levels of creatine kinase isoenzyme and cardiac troponin T,QRS duration,corrected QT(QTc)interval,the pro-portions of ST-segment depression and T wave flattening or inversion in the good prognosis group were lower and shorter than those in the poor prognosis group(P＜0.05).Multivariate Logistic regression analysis showed that creatine kinase isoenzyme,QRS duration,QTc interval,the proportion of ST-segment depression,and T wave flattening or inversion were independent prognostic factors for pa-tients with NSTEMI(P＜0.05).ROC curve analysis showed that the areas under the curve(AUC)of QRS duration,QTc interval,the proportion of ST-segment depression,and T wave flattening or inversion for prognosis evaluation of patients with NSTEMI were 0.832,0.827,0.634,and 0.690.The AUC of combined use of the four was the largest,which was 0.922.Conclusion:QTc,QRS,ST-segment depression,and T wave flattening or inversion on electrocardiogram all can be used to evaluate short-term prognosis of NSTEMI.Be-sides,combined use of them can achieve better evaluation results.