| 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： |
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| 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 |
