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对急性心肌梗塞（AM）早期造栓成功再灌注治疗组及未灌注治疗组发病48h内心电图的QT间期离散度（QTd）及工间期离散度（JTd）进行测定并与正常人组对照研究。结果：正常人组QTd（25．83±4．41），JTd（23．03±6．23）；AMI无论再灌注治疗或未灌注治疗组其QTd、JTd均显著高于正常人组（P＜0.001、P＜0．05）；再灌注治疗组QTd、JTd明显低于未灌注治疗组（P＜0.001），差异有高度显著性。AMI再灌注治疗组无1例发生室颤，未灌注治疗组5例发生室颤（P＜0.001）。室颤患者的QTd、JTd显著高于非室颤者，AMI早期原发性室颤的发生与QTd、JTd增大呈正相关。认为：QTd和（或）JTd可作为AMI早期溶栓治疗冠状动脉成功再灌注和早期评估AMI预后和心功能的重要参考指标。早期QTd增大者应高度警惕严重室性心律失常的发生。
The QTd and JTd of electrocardiogram within 48 hours after onset of acute myocardial infarction (AM) were compared between the two groups. the study. Results: The QTd and JTd of normal control group were 25.83 ± 4.41 and 23.03 ± 6.23, respectively. The QTd and JTd of AMI group were significantly higher than those of normal control group <0.001, P <0.05). The QTd and JTd in reperfusion group were significantly lower than those in non-perfusion group (P <0.001). The difference was highly significant. No ventricular fibrillation occurred in 1 patient in the AMI reperfusion group, and 5 patients in the unperfusion group had ventricular fibrillation (P <0.001). QTd and JTd in VF patients were significantly higher than those in non-VF patients. The incidence of early VFV in AMI was positively correlated with the increase of QTd and JTd. That: QTd and / or JTd can be used as an early AMI thrombolytic treatment of coronary reperfusion success and early assessment of AMI prognosis and cardiac function is an important reference index. Early QTd increase should be highly vigilant of the occurrence of severe ventricular arrhythmias.