急诊经皮冠状动脉介入治疗对急性心肌梗死患者QT离散度的影响

目的 探讨急诊介入治疗对急性心肌梗死患者QT离散度（QTd）及校正QT离散度（QTcd）的影响. 方法 选择完成冠状动脉造影且成功地进行急诊经皮冠状动脉介入治疗（PCI）患者112例为治疗组,并根据血管病变位置分为三个亚组：前降支组、回旋支组、右冠脉组;临床确诊的心肌梗死患者未急诊行PCI治疗70例为对照组.各组于术前及术后或入院后24 h、48 h同步记录12导联心电图,分别计算QTd及QTcd. 结果 急诊PCI术后24 h后及48 h后与对照组相比,治疗组QTd及QTcd均有明显改善（均P＜0.05）,前降支组、回旋支组、右冠组三组之间QTd及QTcd差异无统计学意义（P＞0.05）. 结论 急诊治疗后急性心肌梗死患者QTd及QTcd明显改善;而不同病变血管对心室肌复极的影响程度无明显差异.

The effects of early percutaneous coronary intervention on the QT dispersion in patients with acute myocardial infarction

Objective To investigate the effect of acute intervention therapy on the QT dispersions(QTd)and correction QTd(QTcd)in patients with myocardial infarction. Methods 112 patients with myocardial infarction who had received acute percutaneous coronary intervention(PCI)as study group,and divided it into three sub-group as Left anterior descending group,Left circumflex group and Right coronary group.70 infarction patients without acute intervention therapy as control group.And 12 lead standard surfaces ECG were recorded at beginning and 24h and 48h.respectively. Results After the PCI therapy,QTd and QTcd in study group improved significantly.However,QTd and QTcd had no difference among three sub-group. Conclusion The acute intervention therapy could improve QTd and QTcd in patients with myocardial infarction.The vascular location had no difference in myocardial repolarization.