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风湿性心脏病慢性心房颤动f波振幅的电生理研究
李莉,贾宝成,张宝仁,汪曾炜,朱家麟
0
()
摘要:
目的:对风湿性心脏病(风心病)慢性心房颤动(房颤)的房波电振幅特点进行研究,以探讨其在房颤产生和持续中的意义.方法:选择44例风心病慢性房颤患者在术前作16导左、右房同步心外膜标测图并进行分析,同时与10例室上速(对照组)心内电生理检查结果进行比较.结果:风心病慢性房颤患者A波,左房后壁中、下部f波振幅明显低于对照组A波,左房后壁上、中、下部位f波振幅明显低于右房(P<0.05). 14例房颤电复律后心房各部位的A波幅明显大于术前f波振幅(P<0.01),左心耳f波振幅显著大于左房后壁上、中、下部,左房后壁上部f波振幅显著大于左房后壁中部.风心病慢性房颤患者f波振幅与心房内径和容积无相关.结论: 左房后壁中、下部f波振幅最低,在左房心耳、左房上和左房中、下部之间存在明显电位差,提示左房中、下部是最易产生各向异性传导的部位,推测为AF起源,在明显电位差的部位易形成折返环.
关键词:  风湿性心脏病、心房颤动、f波振幅、电生理学
DOI:
基金项目:
Electrophysiologic study of f-wave amplitude in chronic atrial fibrillation associated with rheumatic heart disease
李莉,贾宝成,张宝仁,汪曾炜,朱家麟
()
Abstract:
To investigate the electrophysiologic characteristics of f-wave amplitude and to evaluate its role in development and persistence of chronic atrial fibrillation (AF) associated with rheumatic heart disease (RHD). Methods: Epicardial mapping was performed in 44 patients with chronic AF of RHD who underwent heart valve surgery. Ten patients with supraventricular tachycardia served as the control group. Results:The f-wave amplitude of left atrium (LA) and middle and low LA posterior regions were significantly lower than those of the control group. The f-wave amplitudes of the upper, middle and low sections in LA posterior region were significantly lower than those in right atrium (RA) (P<0.05). The f-wave amplitudes were compared before and after electrocardioversion in 14 patients with chronic AF. The mean atrial electrogram amplitude during sinus rhythm was significantly higher than that during AF (P<0.01).The f-wave amplitude in left appendage was higher than that in LA posterior region (the upper,middle and the lower part),P<0.05.The f-wave amplitude in the upper section of LA was significantly higher than that in the middle section. The f-wave amplitude in AF group was not correlated to the diameter or volume of both atria. Conclusion: There are amplitudes differences between the upper, middle and lower LA,suggesting that the middle and lower sections of LA posterior wall may be the region producing anisotropy and reentrant circle.
Key words:  rheumatic heart disease  atrial fibrillation  f-wave amplitude  electrophysiology