主动电极在右室流出道间隔部起搏的应用

目的：评价主动固定电极在右室流出道间隔部起搏的先进性。方法：33例患者,男12例,女21例;右室心尖部起搏9例,右室流出道间隔部起搏24例,观察电极置入时间,X线曝光时间和QRS波时限。电极置入后随访观察起搏阈值、阻抗、R波幅度,心功能情况。结果：主动固定电极组的置入时间和X线曝光时间均长于被动电极组（34.34±6.54 min vs 16.78±5.38 min,20.86±4.32 min vs 8.67±4.52 min）;QRS波时限（0.14±0.04 s vs 0.16±0.03 s,P〈0.01）。经过6个月随访,起搏阈值、阻抗两组比较差异无统计学意义,心功能改善。结论：主动固定电极植入优于被动电极植入。

Application of Active Fixation Leads On Right Ventricular Outflow Septum Pacing

Objective： To evaluate the advancement of the application of active fixation leads with right ventricular septum pacing. Methods： 33 patients received permanent pacing, including 12 male and 21female, 9 patients pacing in right ventricular apex, and 24 patients pacing in right ventricular septum. Time for leads planting X - ray exposure time and the width of the QRS waves were recorded. Then pacing thresholds, impedances, R waves amplitude and Cardiac function were observed after the operation. Results：The group of active fixation leads took more time to plant leads and expose in X - ray than the one of Passive leads（34.34 ± 6.54 rain vs 16.78 ± 5.38 min, 20.86 ± 4.32 min vs 8.67 ± 4.52 rain）, with the width of the QRS waves（0.14 ± 0.04 s vs 0.16 ± 0.03 s, P 〈 0.01 ）. There was no significant difference in the pacing threshold and impedances between the two groups during 6 months, and cardiac function was improved. Conclusions： Active fixation leads is superior to passive leads.