【摘要】 目的　观察阵发性心房颤动（房颤）的昼夜分布节律。方法　对阵发房颤的患者进行２４ ｈ动态心电图及持续心电图监测观察其起始、持续和终止的节律变化。结果　３２ 例孤立性阵发性房颤的起始高峰时间４３ 阵（４６．７％ ）发生在午夜至清晨６时。１９ 阵（２０．７％ ）发生在上午６∶００～１２∶００ 时，２１阵（２２．８％ ）发生在１２∶００～１８∶００ 时，９阵（９．８％ ）发生在１８ 时～午夜。持续时间为凌晨４ 时至上午１１时，终止时间为中午及下午。结论　阵发性房颤昼夜分布节律与自主神经及内源性生物活性物质的节律变化有关更多还原

【Abstract】 Objective To observe the circadian variation of paroxysmal atrial fibrillation. Methods 24 hours ambulatory electrocadiograms were recorded in 32 patients whith isolated paroxysmal atrial fibrillation in a drug free state.To determine whether the onset,maintenance,and terminiation of paroxysmal atrial fibrillation were random events or have circadian variation. Results The onset of the arrhythmia was from midnight to 6Am.Maintenance wes from 4Am to 11Am.Termination showed a peak at noon and afternoon. Conclusion Paroxysmal atrial fibrillation showed a circadian variation that is similar to circadian variation of autonomic nervous system and endogenous bioactivity agents.更多还原