Abstract: Objective To observe the clinical outcome of alteplase treating acute myocardial infarction (AMI)in elderly patients.Methods One hundred and eighty-four cases of elderly patients with acute myocardial infarction were randomly divided into control group and observation group with 92 cases in each group.The two group received routine treatment.The control group was administrated with urokinase,while the observation group was treated with alteplase.Clinical efficacy,clinical symptom remission rate and end point were compared between two groups.Results The total efficiency of control group was 87.0% and that of observation group was 95.7%,and the difference was statistically significant.The symptoms of chest pain remission rate and recanalization in observation group were higher than those in the control group(P < 0.05); the mean duration of hospitalization in observation group was significantly lower than that in the control group(P < 0.05); the end event rates were lower than those in control group,but there were not statistically significant.Conclusion Aheplase treating with AMI has curative clinical effect and few adverse reactions.