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目的探讨非窦性心动过缓功能性房室传导阻滞(AVB)的临床意义,为临床诊治提供更多的依据。方法对15例在非睡眠状态下、基础心率正常或窦性心动过速、间歇性出现Ⅰ度或Ⅱ度Ⅰ型房室传导阻滞患者的临床资料进行回顾性分析。结果出现Ⅰ度或Ⅱ度Ⅰ型房室传导阻滞时,于站立或活动(婴儿在哭闹后)后,或予阿托品或山莨菪碱口服后,房室传导阻滞减轻或消失。结论在非睡眠状态下,安静时出现房室传导阻滞而不伴窦性心动过缓,提示迷走神经张力强弱可以对窦房结功能无影响。
Objective To investigate the clinical significance of non-sinus bradycardia (AVB) with functional atrioventricular block (AVB) and to provide more evidences for clinical diagnosis and treatment. Methods The clinical data of 15 patients with non-sleep state, basal heart rate normal or sinus tachycardia, intermittent first degree or second degree atrioventricular block were retrospectively analyzed. Results When a degree Ⅰ or Ⅱ degree atrioventricular block was observed, atrioventricular block was relieved or disappeared after standing or activity (infants crying) or after oral administration of atropine or anisodamine. Conclusions In non-sleep state, atrioventricular block was observed at rest without sinus bradycardia, suggesting that vagal tone may have no effect on sinus node function.