儿童血管迷走性晕厥QT间期离散度及心率变异性分析
血管,,血管迷走性晕厥；QT间期离散度；心率变异性,1资料与方法,2结果,3讨论,【参考文献】
【摘要】 目的 探讨儿童血管迷走性晕厥(VVS)QT间期离散度(QTd)及心率变异性(HRV)的变化。方法 采用日本光电9320K 12导联同步心电图机及DeMar-K100动态心电图仪对52例VVS患儿及30例健康儿童的QTd及HRV进行测量。结果 VVS患儿QTd、校正QT间期离散度和最长QT间期较对照组显著增大，差异具有显著性；直立倾斜试验(HUTT)阳性组和阴性组间QTd值比较差异无显著性。SDNN、SDANN及RMSSD病例组较对照组减小，且病例组SDNN、RMSSD与对照组相比差异有显著性；HUTT阳性组和阴性组间HRV差异无显著性。结论 VVS的发病机制与交感神经和副交感神经调节存在障碍有关。HUTT作为诊断VVS的金标准，其阴性者不能除外VVS。QTd、HRV对于VVS患儿发生心肌缺血、心律失常等心血管事件具有一定的预测价值。【关键词】 血管迷走性晕厥；QT间期离散度；心率变异性
Analyses of QT interval dispersion and heart rate variability in children with vasovagal syncope
XU Jing,XIAO Qunwen,LI Qi,et al.The First Affiliated Hospital,Kunming Medical College,Kunming 650032,China
【Abstract】 Objective To probe into the change of QT interval dispersion(QTd)and heart rate variability(HRV)in children with vasovagal syncope(VVS).Methods 9320K 12 leads synchronous electrocardiograph and DeMar-K100 dynamic electrocardiograph,made in Japan,were used to measure the QTd and HRV in 52 children with vasovagal syncope and in 30 healthy children.Results Compared with the control group,QTd,QTcd(corrected QT dispersion )and QTmax increased in children with VVS ......
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