【摘要】 目的：研究房室结双径路（DAVNP）快径、慢径的顺传及逆传有效不应期。方法：通过心内电生理方法对25例房室结折返性心动过速的病人行心房、心室程序刺激，测定快径、慢径的顺传及道传文氏点、有效不应期（ERP）、跃增值。结果：快径与慢径的顺传ERP有极显著性差异（P＜0．001）。未分组时顺传及逆传文氏点、快径ERP、慢径ERP、跃增值比较无显著性差异。根据顺传快径ERP是否大于逆传快径ERP分为两组，再分别比较顺传快径ERP和逆传快径ERP，发现有非常显著差异，P均＜0．001。结论：DAVNP快径的顺传ERP和逆传ERP截然不同，可能存在快径顺传优势型和快径逆传优势型两种类型，其机制尚不清楚。更多还原

【Abstract】 Objective:To investigate the anterograde and retrograde effective refractory periods(ERP)of atrioventricular fast andslow pathways.Metheds: Twenty-five patients with atrioventriculfar nodal reentrant tachycardia were porformed atrial and ventncularprogrammed stimulation to determine the anterograde and retrograde wenckebach point,ERP of fast and slow pathways andjump value.Results: There existed a significant difference in anterograde ERP of fast and slow pathways(p＜0. 001 ). There wereno significant differences in anterograde and retrograde wenckebach point,ERP of fast pathway(ERPFP ),ERP of slow pathway (ERPsp) and jump value when they were not categorized,When the twenty-five cases were subdivided into two groupsaccording to whether the anterograde ERPFP was greater than the retrograde ERPrP,there were significant differences in anterograde ERPFP compared with retrograde ERPFP(p＜0. 001 ).Conclusion: The anterograde ERPFP is markedly different from the retrograde ERPFP. There are maybe two types:anterograde-predominant fast pathway and retrograde-predominant fast pathway. The mechanism is undeterminated.更多还原