Spectral estimation of HRV in signals with gaps
Spectral estimation of HRV in signals with gaps
Heart rate variability is commonly quantified following spectral estimation. However, it is often difficult to obtain continuous recordings of beat-to-beat intervals without interruptions due to artefacts, noise or sporadic arrhythmias. Such data loss may be seen as gaps in the recordings, and often results in such signals being discarded. While a number of methods has been proposed for spectral estimation in heart rate records with gaps, there are no comprehensive comparisons between them. This paper tries to fill this void, comparing methods and identifying the most versatile and reliable one. The mean (bias error)and standard deviation (random error)of estimates of power in the low frequency band (LF), from 0.04 to 0.15 Hz; in the high frequency band (HF), from 0.15 to 0.4 Hz; and their ratio (LF/HF), were calculated in RR-interval time-series with up to 50% of samples missing through large or small gaps introduced into recordings. ‘Correlogram (bridging)’ and ‘Burg for segments’ methods proved to be the most robust methods for dealing with gaps, but Burg for segments was found to be more robust, especially in the HF band. Our results clearly show that even large gaps (covering a total of 50% of the recording time)can still yield robust spectral estimates of HRV, provided appropriate methods are used.
Biomedical signal processing, Data loss, Electrocardiography, Heart rate variability, Spectral analysis
187-197
Rodríguez-Liñares, L.
6af7bd04-d30d-4c0f-bd6c-1e9057c3fcad
Simpson, D.M.
53674880-f381-4cc9-8505-6a97eeac3c2a
1 July 2019
Rodríguez-Liñares, L.
6af7bd04-d30d-4c0f-bd6c-1e9057c3fcad
Simpson, D.M.
53674880-f381-4cc9-8505-6a97eeac3c2a
Rodríguez-Liñares, L. and Simpson, D.M.
(2019)
Spectral estimation of HRV in signals with gaps.
Biomedical Signal Processing and Control, 52, .
(doi:10.1016/j.bspc.2019.04.006).
Abstract
Heart rate variability is commonly quantified following spectral estimation. However, it is often difficult to obtain continuous recordings of beat-to-beat intervals without interruptions due to artefacts, noise or sporadic arrhythmias. Such data loss may be seen as gaps in the recordings, and often results in such signals being discarded. While a number of methods has been proposed for spectral estimation in heart rate records with gaps, there are no comprehensive comparisons between them. This paper tries to fill this void, comparing methods and identifying the most versatile and reliable one. The mean (bias error)and standard deviation (random error)of estimates of power in the low frequency band (LF), from 0.04 to 0.15 Hz; in the high frequency band (HF), from 0.15 to 0.4 Hz; and their ratio (LF/HF), were calculated in RR-interval time-series with up to 50% of samples missing through large or small gaps introduced into recordings. ‘Correlogram (bridging)’ and ‘Burg for segments’ methods proved to be the most robust methods for dealing with gaps, but Burg for segments was found to be more robust, especially in the HF band. Our results clearly show that even large gaps (covering a total of 50% of the recording time)can still yield robust spectral estimates of HRV, provided appropriate methods are used.
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201903MainSubmitted
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More information
Accepted/In Press date: 6 April 2019
e-pub ahead of print date: 28 April 2019
Published date: 1 July 2019
Keywords:
Biomedical signal processing, Data loss, Electrocardiography, Heart rate variability, Spectral analysis
Identifiers
Local EPrints ID: 432547
URI: http://eprints.soton.ac.uk/id/eprint/432547
ISSN: 1746-8094
PURE UUID: c591f292-9a0b-4412-8eff-cdc0e88fd3df
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Date deposited: 17 Jul 2019 16:35
Last modified: 18 Mar 2024 05:23
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Author:
L. Rodríguez-Liñares
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