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７６例慢－快型房室结折返性心动过速（ＡＶＮＲＴ）患者接受房室结慢径消融术。６５例慢径阻断、９例双径存在但ＡＶＮＲＴ不能诱发、２例快径阻断。慢径阻断后，除快径的前传有效不应期（ＥＲＰ）缩短（２８７．０±７９．０ｍｓｖｓ３４４．０±８７．０ｍｓ，Ｐ＜０．０１）外，房室传导的文氏点、２１阻滞点、室房传导的１１点、快径逆传ＥＲＰ、前传和逆传功能不应期均无明显改变。共放电８４１次，其中无交界区心律的３１７次放电，无一次消融成功。６５例慢径阻断者，交界区心律减少或消失。以上结果提示快径和慢径可能是两条各具电生理特性的传导纤维。
Seventy-six patients with slow-fast AV nodal reentrant tachycardia (AVNRT) underwent atrioventricular node ablation. 65 cases of slow pathway block, 9 cases of double-diameter but AVNRT can not be induced, 2 cases of fast-track block. After the slow pathway was blocked, except for the shortening of the effective early shortening (ERP) shortening (287.0 ± 79.0 ms vs 344.0 ± 87.0 ms, P <0.01), aventricular conduction Venn, 21 points of block, 11 points of conduction in the ventricle, fast-track reverse-pass ERP, no significant change in pre-transmission and retrograde functions. A total of 841 discharges, of which no junction of the heart rate of 317 discharges, no successful ablation. 65 cases of slow-pathway blockers, border rhythm decreased or disappeared. The above results suggest that fast and slow path may be two conductive fibers each with electrophysiological characteristics.