1993
DOI: 10.1016/0169-2607(93)90061-o
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Methods in heart rate variability analysis: which tachogram should we choose?

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Cited by 21 publications
(10 citation statements)
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“…Next, it was subjected to power spectral analysis using the Sparse Direct Fourier Transform algorithm (Rompelman, Snijders, & van Spronsen, 1982) that was directly applied on the arrival times of the R-waves in the ECG without interpolation of the non-equidistant time series. As absolute power spectral density estimates of HRV are not independent of the mean heart period and the metric of the heart beat time series (i.e., heart period series, instantaneous heart rate series, or R-wave events) (Janssen, Swenne, de Bie, Rompelman, & van Bemmel, 1993;van Dellen, Aasman, Mulder, & Mulder, 1985), spectral estimates were normalized by expressing them as squared coefficients of variation (the squared modulation index). It has been theoretically and empirically demonstrated that normalized spectral estimates of HRV are unrelated to mean heart period and utilized metric (de Boer, Karemaker, & Strackee, 1984;Janssen et al, 1993;van Dellen et al, 1985).…”
Section: Apparatus and Physiological Recordingsmentioning
confidence: 99%
“…Next, it was subjected to power spectral analysis using the Sparse Direct Fourier Transform algorithm (Rompelman, Snijders, & van Spronsen, 1982) that was directly applied on the arrival times of the R-waves in the ECG without interpolation of the non-equidistant time series. As absolute power spectral density estimates of HRV are not independent of the mean heart period and the metric of the heart beat time series (i.e., heart period series, instantaneous heart rate series, or R-wave events) (Janssen, Swenne, de Bie, Rompelman, & van Bemmel, 1993;van Dellen, Aasman, Mulder, & Mulder, 1985), spectral estimates were normalized by expressing them as squared coefficients of variation (the squared modulation index). It has been theoretically and empirically demonstrated that normalized spectral estimates of HRV are unrelated to mean heart period and utilized metric (de Boer, Karemaker, & Strackee, 1984;Janssen et al, 1993;van Dellen et al, 1985).…”
Section: Apparatus and Physiological Recordingsmentioning
confidence: 99%
“…They concluded that analysis directly based on R-R intervals could give biased results with respect to the underlying autonomic activity. Janssen et al [14] compared interbeat interval series, spectrum of counts and instantaneous HR series and concluded that spectra were incomparable without normalization of the tachogram with respect to HR. Castiglioni [16] has reported extensively on the differences between HR and HP and emphasized that the link between HR and HP is non-linear, and that this nonlinearity causes discrepancy between HR and HP variabilities.…”
Section: Introductionmentioning
confidence: 98%
“…Several recent reports discuss the problems of using HP versus HR in various time and frequency domain analyses [13][14][15][16][17][18][19]. Niklasson et al [13] have shown considerable differences between measurements based on beat-by-beat HR and measurements based on HP.…”
Section: Introductionmentioning
confidence: 99%
“…Niklasson et al [13] have shown considerable differences between measurements based on beat-by-beat HR and measurements based on HP. Janssen et al [14] compared interbeat interval series, spectrum of counts and instantaneous HR series and concluded that spectra were incomparable without normalization of the tachogram with respect to HR. Janssen et al [14] compared interbeat interval series, spectrum of counts and instantaneous HR series and concluded that spectra were incomparable without normalization of the tachogram with respect to HR.…”
Section: Introductionmentioning
confidence: 99%