摘要
目的分析阵发性心房颤动发作前后心率变异性的变化，探讨自主神经系统在阵发性心房颤动中的作用。方法采用动态心电图记录28例阵发性心房颤动患者24h心电信息，分析其发作前后5min及白天（6：00～22：00）和夜间（22：00～6：00）的心率变异性指标。结果心房颤动发作前5min平均正常R—R间期的标准差（SDNN）、高频成份（HF）较终止后5min显著升高（P〈0．01），低频／高频比值（LF／HF）显著降低（P〈0．01），LF无变化：LF、HF白天均高于夜间（P〈0．01），白天与夜间SDNN、LF／HF无差异；阵发性心房颤动发作前5minSDNN与阵发性心房颤动发作频率呈正相关（r=0．545。P〈0．01），LF／HF与阵发性心房颤动发作频率和持续时间呈负相关（r=-0532、-0．563，均P〈0．01）。结论阵发性心房颤动发作前心率变异性升高，迷走神经支配占优势，使心房颤动得以诱发和持续。
Objective To analyze heart rate variability（HRV） before and after paroxysmal atrial fibrillation（AF） and effect of autonomic nervous system on paroxysmal AF. Methods The parameters of HRV in a five-minute period just before and immediately after paroxysmal AF and those during day and night were analyzed on 24-hour dynamic electrocardiogram recordings in 28 patients with paroxysmal AF. Results The standard deviation of normal-to-normal intervals （SDNN） and high-frequency （HF） power in a five-minute period were significantly higher before than after paroxysmal AF （P〈0.01）, while low-frequency （LF） power was unchanged. LF / HF ratio was significantly lower before paroxysmal AF （P〈0.01）. SDNN in a five-minute period before paroxysmal AF was positively correlated with frequency of paroxysmal AF （r=0.545, P〈0.01）, while LF/HF negatively correlated with frequency and duration of paroxysmal AF （r=-0.532, -0.563, P〈0.01）. Conclusion Increased HRV may contribute to initiation and maintenance of paroxysmal AF.
出处
《心电学杂志》
2011年第1期8-10,共3页
Journal of Electrocardiology(China)
关键词
动态心电图
阵发性心房颤动
心率变异性
自主神经系统
Dynamic electrocardiogram
Paroxysmal atrial fibrillation
Heart rate variability
Autonomic nervous system
