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虽然实验和临床研究提示折返机制参与房颤(Af)的发生和持续过程,Af 的机制尚未完全明了。作者分析以程序电刺激诱发房颤后的心房的电势,并测算代表微折返环大小的波长指数,以进一步澄清 Af 终止和持续的机制。方法:研究对象为作者在行常规电生理检查中诱发出 Af 的病人共30例.根据病人 Af 是否短时自行消失分为两组。20例诱发的 Af 在电生理检查对自动消失(组1),10例诱发的 Af 持续>30分钟(组2)。两组临床上均无显著器质性心脏病,亦无甲状腺功能异常,其平均年龄亦无显著差异。电生理检查按常规方法进行,患者不用镇静剂,抗心律失常药停服≥72小时,采用6F-USCT 电极导管,2支4极导管分别置于高位右房和冠状窦,以记录邻近部位的电活动,1支3极导管跨过三
Although experimental and clinical studies suggest that the reentry mechanism participates in the occurrence and persistence of AF, the mechanism of Af is not fully understood. The authors analyzed the electrical potential of atrial fibrillation induced by electrical stimulation of the program and measured the wavelength index representing the size of the microentire fold loop to further clarify the mechanism of Af termination and persistence. Methods: A total of 30 patients with AF induced by routine electrophysiological examination were divided into two groups according to whether the patients’ Af disappeared on a short-term basis. 20 cases of induced Af automatically disappeared in the electrophysiological examination group (group 1), 10 cases of induced persistence> 30 minutes (group 2). No clinical manifestations of organic heart disease in both groups, nor thyroid dysfunction, the average age there was no significant difference. Electrophysiological examination according to conventional methods, the patient without sedatives, anti-arrhythmic drugs stopped taking ≥72 hours, the use of 6F-USCT electrode catheter, two 4-pole catheter were placed in the high right atrium and coronary sinus to record the adjacent parts of the electricity Activity, a three-pole catheter across three