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目的:观察经皮腔内冠状动脉介入治疗(PCI)血运重建术对心肌复极指标——QT离散度及T波振幅的影响。方法:38例冠心病患者,冠状动脉造影显示一支或多支冠状动脉狭窄≥75%并行PCI术,于术前,术后1天、3天、1周、1个月同步记录十二导联体表心电图。测量并计算各项心室肌复极心电学指标:QTd、QTcd、总T波振幅(ΣT)、总正向T波振幅(ΣT+)、总负向T波振幅(ΣT-)。结果:术后各时间点QTd、QTcd较术前明显降低(P<0.001),术后各时间点之间比较无统计学差异;ΣT、ΣT+在1个月明显增大,与术前及术后各时间点有显著差异(P<0.001),ΣT+术后1d较术前明显降低(P<0.05),ΣT-术后1个月负值减小,与术前至术后1周比较有统计学意义(P<0.005;P<0.001)。结论:PCI后QT离散度与T波振幅、极向呈非同步性改善,可作为PCI后不同时期的心室肌复极改善的指标。
Objective: To observe the effect of percutaneous transluminal coronary intervention (PCI) revascularization on QRS dispersion and T wave amplitude. Methods: 38 patients with coronary heart disease, coronary angiography showed one or more coronary stenosis ≥ 75% concurrent PCI, preoperative, postoperative 1 day, 3 days, 1 week, 1 month simultaneously recorded 12 Combined table electrocardiogram. Measurement and calculation of ventricular repolarization ECG indicators: QTd, QTcd, total T wave amplitude (ΣT), total positive T wave amplitude (ΣT +), total negative T wave amplitude (ΣT-). Results: The postoperative QTd and QTcd were significantly lower than those before operation (P <0.001), and there was no significant difference between the time points after operation. The ΣT and ΣT + increased significantly at 1 month, (P <0.001), ΣT + 1d after operation was significantly lower than that before operation (P <0.05), negative value of ΣT-1 month after operation decreased, compared with preoperative 1 week after operation Statistical significance (P <0.005; P <0.001). Conclusion: After PCI, QT dispersion and T wave amplitudes, asynchronism improve, which can be used as indicators of ventricular repolarization in different periods after PCI.