Different methods of heart rate variability analysis reveal different correlations of heart rate variability spectrum with average heart rate
Different methods of heart rate variability analysis reveal different correlations of heart rate variability spectrum with average heart rate
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DOI：
10.1016/j.jelectrocard.2004.09.015
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发表时间：
2005-01-01
影响因子：
1.3
通讯作者：
Pluta, W
中科院分区：
文献类型：
--
作者：
Sacha, J;Pluta, W
心率变异性（HRV）频谱可以从R-R或瞬时心率（IHR）序列计算。由于这些信号是相互的，它们在测定HRV与平均HR的相关性时可能会产生相反的结果。目的：本研究的目的是揭示HRV参数如何与HR相关，这取决于所用信号的种类以及归一化过程或校正信号的使用是否会影响相关性。分析中考虑了55例患者的心电图记录（512次搏动）。计算RR和IHR。将两个信号除以其平均值，得到校正的RR和IHR。根据这4种信号估计心率变异性谱。结果：RR法测得的总功率和LF与HR呈负相关，IHR法测得的总功率和LF与HR呈正相关（相关系数差异有显著性，P <0.01）。HE和HR之间的相关性的符号是相同的，无论应用的信号类型如何。校正信号的应用使得结果几乎相同，尽管信号来源不同（RR或IHR）。LF/HF、nLF和nHF与HR的相关性在所有病例中均相似。结论：信号类型决定TP、LF和HR之间相关性的符号。从校正信号、归一化量和LF/HF获得的参数揭示了与HR的一致关系。（C）2005 Elsevier Inc. All rights reserved.
Heart rate variability (HRV) spectrum can be calculated from the R-R or the sequence of instantaneous heart rates (IHRs). Because these signals are reciprocal, their use in the determination of the correlation of HRV with average HR may yield opposite results.Aim: The aim of this study is to reveal how HRV parameters correlate with HR depending on the kind of signal used and whether the normalization procedure or use of corrected signals affect the correlations.Methods: Electrocardiographic recordings (512 beats) of 55 patients were considered in the analysis. RR and IHR were calculated. Both signals were divided by their average values yielding the corrected RR and IHR. Heart rate variability spectra were estimated from these 4 kinds of signals. Total power (TP), low frequency (LF) and high frequency (HF) components, LF/HF ratio, and normalized values (ie, nLF, nHF) were calculated.Results: Total power and LF estimated from RR correlated negatively with HR, but those calculated from IHR revealed a trend toward a positive correlation (respective correlation coefficients significantly differed, P < .01). The sign of correlation between HE and HR was the same regardless of the type of signal applied. The application of corrected signals made the results almost identical despite different signal origins (RR or IHR). The correlations of LF/HF, nLF, and nHF with HR were similar in all cases.Conclusions: The type of signal determines the sign of correlation among TP, LF, and HR. The parameters obtained from corrected signals, normalized quantities, and LF/HF reveal a consistent relationship with HR. (C) 2005 Elsevier Inc. All rights reserved.