房室旁道间歇性逆传阻滞的探讨ioven

Evaluation of atrioventriocular accessory pathway intermittent retrograde conduction block

为探讨房室旁道间歇性逆传阻滞的发生机制及临床意义 ,对房室旁道患者射频导管消融术中作腔内电生理检查 ,观察房室顺传和室房逆传功能及途径。结果显示261例中有7例 (4例为隐匿性预激综合征 )为旁道逆向 (或双向 )传导阻滞 (2.7% )。尽管旁道间歇性逆传阻滞是一种少见现象 ,但由于旁道传导阻滞 ,无法对旁道进行定位及射频导管消融 ,因此了解旁道有无间歇性逆传阻滞 。

To evaluate mechanism and clinical significance of atrioventricular accessory pathway with intermittent retrograde conduction block,pathways of atrioventricular antegrade and ventrioatrial retrograde conduction were investigated by electrophysiologically examining patients with atrioventricular accessory pathway during treatment with radiofrequency current catheter ablation.Results showed that 7 out of 261 patients(2.7%)had retrograde(or bidirectional)conduction block in accessory pathways.Although it is an uncommon phenomenon that atrioventricular accessory pathways has intermittent retrograde conduction block,conduction block of accessory pathways would prevent radiofrequency current catheter ablation from being carried out due to difficulties in locating accessory pathways.Therefore,finding of intermittent retrograde conduction block in accessory pathways is of clinical significance.