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目的 探讨PTCA及支架术对QT离散度 (QTd)及心肌节段性运动的影响。 方法 36例患者于术前行十二导联心电图、超声心动图和冠状动脉造影。PTCA及支架术后 2周复查心电图和超声心动图。 结果 全组QTcd由PTCA及支架术前的 71 84ms± 16 72ms降至术后的 5 9 37ms± 14 97ms(P <0 0 0 1)。术前有心肌节段性收缩运动异常而经PTCA及支架术获得血运重建的 14 1个节段中 ,术后有 10 7个节段 (6 2 4 1% )功能得到改善 (P<0 0 0 1)。 结论 成功的PTCA及支架术可使冠心病患者QTd显著缩短 ,减低恶性心律失常和心源性猝死的发生率 ,并能改善缺血心肌的收缩功能 ,从而改善患者的预后
Objective To investigate the effect of PTCA and stenting on QTd and myocardial segmental movement. Methods Thirty-six patients underwent preoperative electrocardiogram, echocardiography and coronary angiography. ECG and echocardiography were reviewed 2 weeks after PTCA and stent. Results The total QTcd decreased from 71 84 ms ± 16 72 ms before PTCA and stenting to 597 ms ± 14 97 ms postoperatively (P 0 01). Preoperative segmental myocardial systolic dysfunction and PTCA and stenting obtained by revascularization in 14 1 segments, postoperative 10 7 segments (6 2 4 1%) function improved (P <0 0 0 1). Conclusion Successful PTCA and stenting can significantly shorten the QTd in patients with coronary heart disease, reduce the incidence of malignant arrhythmia and sudden cardiac death, and can improve myocardial ischemic contractile function, thereby improving the prognosis of patients