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首页> 外文会议>Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE >Nonlinearity changes of 24 hour heart rate variability in childrenwith tetralogy of Fallot
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Nonlinearity changes of 24 hour heart rate variability in childrenwith tetralogy of Fallot

机译：儿童24小时心率变异性的非线性变化法洛四部曲

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It has been reported that sudden cardiac death and ventriculartachycardia can occur after treatment of tetralogy of Fallot (TOF). Itis likely that TOF has effect on the heart rate variability because ofthe ventricular arrhythmia. We evaluated how complex and periodicdynamics of heart rate occurred in the normal children (group A, n=13)and TOF children (group B, n=13) throughout 24 hours. We examined eachECG data on 24-hour Holter ECG segmented into 1-hour length. We analyzedeach HR time series, and quantified the overall complexity of each HRtime series by its correlation dimension. We also calculated the powerspectrum of HR, and obtained low-frequency component (0.08-0.15 Hz) andhigh-frequency component (0.15-0.4 Hz). We compared the results betweengroup A and B. Group B had lower correlation dimension(4.055±0.4134 vs. 4.9310±0.2054, p<0.05) than group A,even though there were no significant differences in thelow-(0.9864±0.5598 vs. 1.5560±0.8325, p<0,05) andhigh-(1.1168±0.1.1448 vs. 0.9271±0.6528, p<0.05)frequency components. It can be concluded that HR time series of group Bare more regular than those of group A, and that correlation dimensionreveals a nonlinear characteristics of HR time series which is notdetermined in the frequency domain
机译：有报道说心源性猝死和心室 心律失常可在治疗法洛四联症（TOF）后发生。它 由于以下原因，TOF可能会影响心率变异性 室性心律失常。我们评估了复杂性和周期性 正常儿童的心率动态变化（A组，n = 13） 和TOF儿童（B组，n = 13）在整个24小时内。我们检查了每个 24小时动态心电图的心电图数据分为1小时长度。我们分析了 每个HR时间序列，并量化每个HR的整体复杂性 时间序列的相关维度。我们还计算了功率 HR的频谱，以及获得的低频分量（0.08-0.15 Hz）和 高频分量（0.15-0.4 Hz）。我们比较了两者之间的结果 A组和B组。B组的相关维度较低 （4.055±0.4134 vs. 4.9310±0.2054，p <0.05）比A组， 即使两者之间没有显着差异 低（0.9864±0.5598与1.5560±0.8325，p <0.05）和 高（（1.1168±0.1.1448 vs.0.9271±0.6528，p <0.05） 频率分量。可以得出结论，B组的HR时间序列 比A组更规则，并且相关维度 揭示了HR时间序列的非线性特征 在频域中确定

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