目的 :研究急性心肌梗塞溶栓治疗对QT离散度的影响。方法 :对急性心肌梗塞 (AMI)后QT间期离散度 (QTd)在溶栓前后的对比测定。结果 :心肌梗塞急性期QTd最大 ,溶栓再通者QTd明显减少 ,溶栓未通者无明显变化 ,再通组与未通组之间存在显著差异。结论 :ATd为一种无创、简便易行之方法 ,可作为AMI心电图的常规观察项目 ,评价病情进展 ,对AMI早期溶栓治疗再灌注是重要的指标之一 Objective: To study the influence of thrombolytic therapy on QT dispersion in patients with acute myocardial infarction. Methods: A comparative study of QTd after acute myocardial infarction (AMI) before and after thrombolysis was performed. Results: The QTd in the acute phase of myocardial infarction was the largest, and the QTd of thrombolytic recanalization was significantly reduced. There was no significant change in patients with thrombolytic therapy, and there was a significant difference between recanalization group and non-intervention group. Conclusion: ATd is a non-invasive and easy-to-use method, which can be used as a routine observation item of AMI electrocardiogram to evaluate the progress of the disease. It is one of the important indicators of early AMI thrombolysis and reperfusion