NDLI: Heart Rate and Systolic Blood Pressure Variability Before and During Obstructive Sleep Apnea Episodes

Content Provider	IEEE Xplore Digital Library
Author	Glos, M. Romberg, D. Fietze, I. Penzel, T.
Copyright Year	2007
Description	Author affiliation: Charite - Univ., Berlin (Glos, M.)
Abstract	In 18 patients with obstructive sleep-apnea syndrome (OSAS), time-variable spectral analysis was employed to study the course of heart-rate variability (HRV) and blood-pressure variability (BPV), before and during apnea episodes. Time intervals of 6 minutes' length were detected and analyzed from nocturnal sleep recordings. In addition, a software package was developed in $MATLAB^{reg}$ that calculates time- dependent output spectra by applying short-time Fourier transformation (STFT). Various spectral parameters from HRV and SBV were extracted by means of integration and scaling. In the transition from normal respiration to an apnea episode, significant parameters of HRV and systolic blood pressure variability (SBPV) are increased, whereby alterations were able to be detected even before apnea onset. The time- variant analysis of HRV and SBPV in the frequency range appears to be a suitable method for description of the relationship between the development of apnea and alterations in autonomous tone in patients with OSAS.
Starting Page	263
Ending Page	266
File Size	791740
Page Count	4
File Format	PDF
ISBN	9781424407873
ISSN	1557170X
DOI	10.1109/IEMBS.2007.4352274
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-22
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heart rate Blood pressure variability Sleep apnea Heart rate variability Cardiology Blood pressure Biomedical monitoring Hafnium Frequency Signal analysis
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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