Reproducibility of heart rate variability from short-term recordings during five manoeuvres in normal subjects.
Reproducibility of heart rate variability from short-term recordings during five manoeuvres in normal subjects.
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DOI：
10.1080/0309190031000111380
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发表时间：
2003-11-01
影响因子：
--
通讯作者：
Yanez, O.
中科院分区：
文献类型：
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作者：
Carrasco, S.;Gonzalez, R.;Yanez, O.
主要目的：由于可获得的信息有限且相互矛盾，我们评估了正常受试者在仰卧、控制呼吸、站立、运动和恢复状态下，从短期记录中获得的心率变异性的时间和光谱测量的可重复性。方法和步骤：在指定的动作中获得11个个体的5分钟行车图，并在5天内重复3次。除了时间和频谱指标外，还计算了中心频率。主要结局和结果：方差分析显示任何研究参数的重复之间无显著差异。多数类内相关系数大于0.68。低分量的中心频率在操纵过程中减小。结论：在健康个体中，从短期记录中获得的心率变异性的时间和频谱测量值在5天内是稳定的。谱成分的中心频率可以作为自主神经活动的指标。
Primary objective: Due to limited and contradictory information available, the reproducibility of temporal and spectral measurements of heart rate variability from short-term recordings was evaluated in normal subjects during supine, controlled breathing, standing, exercise and recovery conditions. Methods and procedures: Five-minute tachograms from 11 individuals were obtained during the specified manoeuvres, and repeated three times in a five day period. Besides temporal and spectral indexes, the central frequencies were also computed. Main outcomes and results: The ANOVA presented non-significant differences among the repetitions for any of the parameters studied. Most intra-class correlation coefficients were over 0.68. The central frequency of the low component diminished during the manoeuvres. Conclusions: In healthy individuals, the temporal and spectral measurements of the heart rate variability from short-term records are stable in a five day period for the manoeuvres studied. Central frequencies of the spectral components might be used as indexes of the autonomic activity.