【摘要】 目的探讨短PR间期综合征患者的食道电生理特点。方法对具有短PR(PR<0.12秒)和QRS波正常的15例患者进行食道电生理检查观察心房S1S1、S1S2刺激时S1R、S2R间期变化等。结果15例短PR患者能保持1:1房室传导之最快S1S1频率,均≥200次min。S1R间期均≤200ms,其中11例S1R随着心房S1S1刺激频率增快,间期有所延长,但延长值≤50ms,4例S1R长度固定不变。S1S2刺激12例S2R基本不变,3例S2R跳跃延长≥70ms,其中1例有心房回波,1例发生折返性室上性心动过速,AVER平均值<250ms。结论短PR间期的机制与加速房室结传导有关,不参与折返性心动过速的形成。更多还原

【Abstract】 Objective To study the characteristics of oesophageal electrophysiologic examination of short PR interval.Methods 15 patiens with short PR interval and normal QRS wave were recievied oesophageal electrophysiologic examination.To observe the change of S1R interval during atrial pacing end the change of S2R interval during atrial preenature stimulation etc.Results 15 cases of short PR interval 1:1atrioventricular nodal conduction at the pacing rate was>200 beats/min.During atrial pacing S1R Of all was≤200ms constantly with little change;During atrial preenature stimulation S2R was constant or changed little.The dual pathways of AV node occurred in 3 cases;one had atrial echo and one tachycardias was induced.AVERP <250ms.[WTHZ]Conclusion The reasons of short PR interval depend on characters of the enhanced AV nodal conduction.There is no relation between short PR interval and superaventricular tachycardia.更多还原