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目的 探讨心房不同部位起搏对离体家兔房室结（ Ａ Ｖ Ｎ）电生理特性的影响。方法 采用等量血液－ 台氏液，经 Ｌａｎｇｅｎｄｏｒｆ装置持续灌流离体兔心，分别从房间隔（ Ｉ Ａ Ｓ）和终末嵴（ Ｃ Ｔ）刺激心脏，观察从上述两个部位起搏心脏时， Ａ Ｖ Ｎ 前传的各项电生理参数。结果 从 Ｉ Ａ Ｓ和 Ｃ Ｔ 起搏时， Ａ Ｈ 间期、 Ａ Ｖ Ｎ功能不应期（ Ａ Ｖ Ｎ－ Ｆ Ｒ Ｐ）、 Ａ Ｖ Ｎ 前传文氏周期（ Ａ Ｖ Ｎ－ Ｗ Ｃ Ｌ）无显著差异。结论 心房不同部位起搏心脏对该模型兔心 Ａ Ｖ Ｎ 电生理特性无影响。
Objective To investigate the effect of different parts of atrium pacing on electrophysiological characteristics of isolated atrioventricular node (A V N) in isolated rabbit. Methods The same volume of blood-Tyrode’s solution was used. Peripherally isolated rabbit hearts were perfused with Langendorf apparatus, and the heart was stimulated by atrial septum (I A S) and terminal crest (C T) respectively. , A V N pre-transmission of the electrophysiological parameters. Results During I A S and C T pacing, A H interval, A V N functional refractory period (A V N- F R P), A V N pre-sentative Wechsiness cycle (A V N- W C L) No significant difference. Conclusion The pacing heart in different parts of the atrium has no effect on the electrophysiological characteristics of A V N in this model.