摘要
目的 本研究探讨电生理检查时诱发的房室结折返性心动过速（AVNRT）伴2:1AVB的机制和阻滞部位。方法 回顾分析电生理检查中遇到的9例AVNRT伴2:1AVB患者的资料。结果4例希氏束记录不全的不作分析,其余5例患者中,3例在阻滞的激动上见到H波,在发生AVNRT伴2:1AVB起始阶段出现H-V文氏传导阻滞伴LBBB或RBBB,另外2例在阻滞的激动上未见H波,但有一例2:1AVB过程中突然出现一次H-V3:1文氏传导阻滞。结论 电生理检查诱发的AVNRT伴2:1AVB可能是功能性的希-浦系统阻滞。
Objective The purpose of this study was to clarify the mechanism of 2:1 atrioventricular block (AVB) during AV node reentrant tachycardia (AVNRT) induced during electrophysioloic study.Methods In consecutive patients with AVNRT referred for electrophysiologic study, the data of 2 : 1 AVB during induced AVNRT was retrospectively analysed. Results The data of 4 patients was excluded from analyzing because of the unsatisfactory recording of His bundle potential during AVNRT. A His bundle deflection was present in the blocked beats in three of the remaining 5 patients and absent in the other two. At the beginning of AVNRT induced in those patients whose His bundle deflection was present in the blocked beats, H-V Wenckebach sequence with a QRS pattern of RBBB or LBBB was seen preceding and following the 2 : 1 AVB. A pattern of H-V Wenckebach phenomenon occurred once during AVNRT with 2:1 AVB in one of the two patients whose His bundle deflection was absent in the blocked beats.Conclusion The induced 2:1 AVB during AVNRT is due to functional block in the His-Purkinje system regardless of the presence or absence of a His bundle deflection in blocked beats.
出处
《中国介入心脏病学杂志》
2002年第1期19-22,共4页
Chinese Journal of Interventional Cardiology
关键词
房室结折返性心动过速
房室传导阻滞
电生理检查
Atrioventricular node reentrant tachycardia with 2: 1 block
Cardiac electrophysiologic study
