Combining HRV features for automatic arousal detection

J. Foussier, P. Fonseca, X. Long, B. Misgeld, S. Leonhardt

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)
150 Downloads (Pure)

Abstract

Arousals are vital for sleep as they ensure its reversibility. However, an increased amount of arousals might indicate sleep disturbances or disorders. Since arousal events are similar to wake states but much shorter than the standard annotation epoch length of 30 s, they degrade sleep staging classification performance. Arousals are also related to physiological activities, such as cardiac activation, thus making the detection in a less disturbing way than with polysomnographies in sleep laboratories possible. Therefore, we analyzed 72 features derived from the heart rate variability (HRV) of 15 whole-night polysomnographic ECG recordings to quantify cardiac activation during sleep. After calculating the Mahalanobis distance (MD), ranking the best uncorrelated features and performing MANOVA, we show that combining multiple features increases the discriminative power (MD = 1.56, Chi-square = 33117) to detect arousals during the night compared to the best single feature (MD = 1.16, Chi-square = 16633). A linear mixed model is used to show between-subject effects and to validate the significance of each feature based on Wald test statistics.
Original languageEnglish
Title of host publicationProceedings on Computing in Cardiology, 22-25 September 2013, Zaragoza, Spain
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages1003-1006
Publication statusPublished - 2013
EventComputers in cardiology : IEEE conference -
Duration: 22 Sep 201325 Sep 2013

Publication series

NameComputing in Cardiology
Volume40
ISSN (Print)2325-8861

Conference

ConferenceComputers in cardiology : IEEE conference
Period22/09/1325/09/13

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