QT离散度 (QTd)延长通常可见于许多疾病 ,如急性冠脉综合征、充血性心力衰竭、恶性心律失常、肥厚性心肌病、二尖瓣脱垂等。但直接 PTCA对 AMI患者 QTd的影响研究较少 ,为此 ,我们观察了 AMI直接 PTCA及术后冠脉内注入尿激酶对 QTd的影响。1　对象和方法1.1　对象　 1999- 0 8 QT Dispersion (QTd) prolongation can often be found in many diseases, such as acute coronary syndrome, congestive heart failure, malignant arrhythmia, hypertrophic cardiomyopathy, mitral valve prolapse and so on. However, direct PTCA on AMI patients with QTd less research, therefore, we observed the AMI direct PTCA and postoperative coronary urokinase into the QTd. 1 Objects and Methods 1.1 Objects 1999- 0 8