Document Detail

Measurement of heart rate variability and stress evaluation by using microwave reflectometric vital signal sensing.
MedLine Citation:
PMID:  20886996     Owner:  NLM     Status:  MEDLINE    
In this paper, we present two robust signal processing techniques for stress evaluation using a microwave reflectometric cardiopulmonary sensing instrument. These techniques enable the heart rate variability (HRV) to be recovered from measurements of body-surface dynamic motion, which is subsequently used for the stress evaluation. Specifically, two novel elements are introduced: one is a reconfiguration of the HRV from the cross-correlation function between a measurement signal and a template signal which is constructed by averaging periodic component over a measurement time. The other is a reconstruction of the HRV from the time variation of the heartbeat frequency; this is evaluated by a repetition of the maximum entropy method. These two signal processing techniques accomplish the reconstruction of the HRV, though they are completely different algorithms. For validations of our model, an experimental setup is presented and several sets of experimental data are analyzed using the two proposed signal processing techniques, which are subsequently used for the stress evaluation. The results presented herein are consistent with electrocardiogram data.
Daisuke Nagae; Atsushi Mase
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Review of scientific instruments     Volume:  81     ISSN:  1089-7623     ISO Abbreviation:  Rev Sci Instrum     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-10-04     Completed Date:  2011-01-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0405571     Medline TA:  Rev Sci Instrum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  094301     Citation Subset:  IM    
Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga 816-8580, Japan.
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MeSH Terms
Fourier Analysis
Heart Rate*
Radar / instrumentation*
Stress, Physiological*
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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