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通过30例房室结折返性心动过速(AVNRT)的慢径消融,对比术前、术后的电生理检查,发现:慢径消融后房室结(AVN)正向1:1传导最短周期延长,而逆向1:1传导最短周期无明显变化;消融后快径有效不应期缩短,而房室可逆向传导的不应期无变化;消融后 A-V 间期无明显变化。本研究证实在房室结双径路中快径传导受慢性径路影响。射频消融改良房室结的作用结果;在于改变 AVN 不应期及其传导速度。通过慢径消融对房室结电生理特性的影响,慢径消融治疗室上速得到了进一步的肯定。
Through 30 patients with atrioventricular nodal reentrant tachycardia (AVNRT) slow path ablation, compared with preoperative and postoperative electrophysiological examination, found that: slow pathway ablation atrioventricular node (AVN) positive 1: 1 conduction shortest cycle Prolonged, but the reverse 1: 1 conduction shortest period of no significant change; shortening effective shortening effective shortening after ablation, and atrioventricular reverse refractory refractory period did not change after ablation AV interval no significant change. This study confirms that fast pathway conduction is affected by chronic pathways in atrioventricular junction dual pathways. Radiofrequency ablation to improve the outcome of atrioventricular node; is to change AVN refractory period and its conduction velocity. The effect of slow-pathway ablation on supraventricular tachycardia was further confirmed by the effect of slow-pathway ablation on the electrophysiological characteristics of atrioventricular node.