心房按需起搏时心内电图的形态与起搏参数的关系  

Correlation between shape of intracardiac electrogram and pacing parameters during atrial demand pacing

作　　者：陈锐华[1] 江时森[1] 刘保军[1] 李俭春[1] 徐军[1] 宫剑滨[1] 张启高[1] 周春宁[1] 

机构地区：[1]南京军区南京总医院,南京210002

出　　处：《医学研究生学报》1999年第S1期63-65,共3页Journal of Medical Postgraduates

摘　　要：目的： 观察心房按需起搏（ＡＡＩ）时心内电图的形态与起搏阈值等参数的关系。　方法：对３６ 例ＡＡＩ起搏时记录的心内电图的Ａ 波形态、振幅、Ａ－Ｖ段上抬幅度进行详细测定，并与起搏阈值、心肌阻抗等参数进行相关分析。　结果：Ａ波形态、振幅与起搏阈值、心肌阻抗均无显著相关（Ｐ＞ ０．０５），而Ａ－Ｖ 段上抬的幅度与起搏阈值呈明显负相关（ｒ＝ － ０．５４８ ６， Ｐ＜ ０．０５）。Ａ－Ｖ段高抬组的起搏阈值（０．６８±０．１７）Ｖ，显著低于Ａ－Ｖ段低抬组的（１．１±０．２４）Ｖ （Ｐ＜ ０．０１）。　结论：心内电图Ａ－Ｖ段上抬的足够幅度（＞ ０．３ ｍ Ｖ）可作为ＡＡＩ起搏时的一个重要技术指标，对避免电极脱位、保证较低的起搏阈值水平均具重要的临床意义。Objectives: The arm of this study was to invastigate the correlation between shape of intracardiac electrogram and pacing parameters. Methods: The shape of A ware and A V segment level were assessed in 36 cases of AAI, and correlation was performed among those results and pacing parameters. Results: There was no correlation between amplitude of A wave and pacing threshold ( P <0.05), but a negative correlation between elevation amplitude of A V segment and pacing threshoed ( r =-0.548 6, P <0.05). The pacing threshold in the High amplitude A V segment group was much lower than that in the low amplitude A V segment group (0.68±0.17 V vs 1.1±0.24 V, P <0.01). Conclutions:These results showed that amplitude of A V segment elevation (≥0.3 mV) is a important technological parameter for AAI Pacing. It has important Clinical significance to insure lower pacing threshold level and avoid electrode dislocation.

关 键 词：心脏起搏 心内电图 起搏阈值 

分 类 号：R541.7[医药卫生—心血管疾病]