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目的:探讨右心室高位室间隔起搏与右心室心尖部起搏对血流动力学的影响。方法:右心室高位室间隔起搏组20例,右心室心尖部起搏组20例,分别于术前、术后3个月行心电图、超声心动图检查,术中测定起搏参数及曝光时间。结果:2组在起搏阈值、感知、阻抗,电极脱位率方面差异均无统计学意义,右心室高位室间隔起搏组手术曝光时间长于右心室心尖部起搏组。与后者比较,右心室高位室间隔起搏组起搏后QRS波宽度变窄,射血分数、每搏量明显增大,差异有显著性。结论:右心室高位室间隔起搏更接近生理性起搏,血流动力学更好,可能是一个更佳的起搏部位。
Objective: To investigate the effects of high right ventricular septal pacing and right ventricular apical pacing on hemodynamics. Methods: 20 cases of right ventricular superior ventricular septal pacing group and 20 cases of right ventricular apical pacing group were performed electrocardiogram and echocardiography before operation and 3 months after operation. The intraoperative pace parameters and exposure time . Results: There was no significant difference in pacing threshold, sensation, impedance and electrode dislocation rate in the two groups. The exposure time in the right ventricular superior ventricular septum pacing group was longer than that in the right ventricular apical pacing group. Compared with the latter, the amplitude of QRS wave width, the ejection fraction and stroke volume of right ventricular superior ventricular septum pacing group after pacing were significantly increased, the difference was significant. Conclusion: Right ventricular superior ventricular septal pacing is closer to physiological pacing and better hemodynamics may be a better pacing site.