心房超常传导的临床意义初探

Clinical significance of supernormal atrial conduction

目的 探讨心房超常传导 (SNC)的发生率及临床意义。方法 对 90例无器质性心脏病患者进行系统电生理检查 ,观察有无SNC发生及心房超常传导带 (SNCZ)与传导时间最大减少值 (MDCT) ;并根据心内电生理检查时能否诱发出房性心律失常而分为两组 (诱发出房性心律失常者为Ⅰ组、未诱发出者为Ⅱ组 ) ,比较两组SNC的检出率 ,探讨SNC与房性心律失常的相关性。结果 90例患者中 43例 ( 4 7.78% )有SNC现象 ,其中Ⅰ、Ⅱ两组SNC的发生率分别为 70 .0 0 %与 3 6.67% ;而 43例有SNC现象者中 2 1例 ( 4 8.84% )有诱发的房性心律失常 ,47例无SNC者中仅 9例 ( 19.17% )有诱发的房性心律失常 ,两者比较相差非常显著 (P <0 .0 1)。结论 SNC的发生与房性心律失常的诱发呈正相关。

Objective To investigate the incidence clinical significance of supernormal atrial conduction (SNC). Methods The SNC, supernormal atrial conduction zone (SNCZ) and maximum decrease in conduction time (MDCT) were examined with routine intracardiac electrophysiologic techniques in 90 cases of non organic cadiac diseases. According to the induction of atrial arrhythmia during examination, the patients were divided into group Ⅰ in which atrial arrhythmia were induced and group Ⅱ in which no atrial arrhythmia were induced. In these 2 groups, the detactable rates of SNC were compared and the correlationship between SNC and atrial arrhythmia was analyzed. Results Compared with group Ⅱ (36.67%), the incidence of SNC was increased significantly in group Ⅰ (70.00%) (P<0.01). Among 43 patients with SNC, 21 patients (48.84%) had the induced atrial arrhythmia. But among 47 patients without SNC, 9 patients (19.17%) had the induced atrial arrhythmia. Obvious difference was found in these 2 groups (P<0.01). Conclusion It suggests that there is well correlation between SNC and atrial arrhythmia.