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我们将吴氏下位法加以改良，设计了一种消融方法，称改良下位法，并与吴氏下位法进行了比较。改良下位法消融４１例，吴氏下位法消融１０例。改良下位法不插冠状窦电极，在后前位透视下，大头导管从希氏束下方１ｃｍ处逐渐移向冠状窦口反复消融。射频发放时间与能量采用渐增法。结果：改良下位法与吴氏下位法复发率分别为３％和２０％（Ｐ＜０．０５）；Ｘ线暴露时间分别为２４±１８ｍｉｎ和，３８±２Ｏｍｉｎ（Ｐ＜０．０５），操作时间分别为１１５±３８ｍｉｎ和１６４±４０ｍｉｎ（Ｐ＜０．０５），成功率分别为９５％和９０％（Ｐ＞０．０５）。
We improved the inferior law of Wu and devised a method of ablation, saying that we improved the inferior law and compared it to the lower law of Wu. Modified 41 cases of inferior position ablation, 10 cases of Wu’s lower position ablation. Improve the inferior method is not inserted coronary electrodes, in the post-anterior fluoroscopy, the bulk catheter from the bundle below 1cm at the gradual shift toward the coronary sinus repeated ablation. RF release time and energy using incremental method. Results: The recurrence rates of modified inferior position method and lower position method were 3% and 20% respectively (P <0.05). The X-ray exposure time was 24 ± 18min and 38 ± 2Omin respectively (P <0.05) The time was 115 ± 38min and 164 ± 40min respectively (P <0.05), the success rates were 95% and 90% respectively (P> 0.05).