Effects of record length selection on the accuracy of spectral estimates of heart rate variability: A simulation study

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Abstract

To evaluate the effects of record length selection on the accuracy of spectral estimates of heart rate variability (HRV), a simulation study was carried out using a set of 58 signals obtained by autoregressive (AR) fitting a representative sample of real HRV signals. Four record lengths of 180, 300, 420, and 540 s were considered. Spectral estimation was performed by both the Blackman-Tukey (B-T) and AR methods. Accuracy was assessed for: 1) point spectral estimates, by computing the normalized averaged bias (NAB) and variance (NAV); and 2) the most commonly used spectral parameters [total power (TP) and the powers in the bands: very low frequency (VLF) (0 / 0.04 Hz), low frequency (LF) (0.04 / 0.15 Hz), and high frequency (HF) (0.15 / 0.45 Hz)], by computing the normalized bias (NB) and variance (NV). The results are: whatever the record length considered, the 90th percentiles (90P) of the NAB were

Original languageEnglish
Pages (from-to)754-757
Number of pages4
JournalIEEE Transactions on Biomedical Engineering
Volume43
Issue number7
DOIs
Publication statusPublished - Jul 1996

ASJC Scopus subject areas

  • Biomedical Engineering

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