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Magnitude and sign correlations in heartbeat fluctuationsWe propose an approach for analyzing signals with long-range correlations by decomposing the signal increment series into magnitude and sign series and analyzing their scaling properties. We show that signals with identical long-range correlations can exhibit different time organization for the magnitude and sign. We find that the magnitude series relates to the nonlinear properties of the original time series, while the sign series relates to the linear properties. We apply our approach to the heartbeat interval series and find that the magnitude series is long-range correlated, while the sign series is anticorrelated and that both magnitude and sign series may have clinical applications.
Document ID
20040112497
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ashkenazy, Y.
Ivanov, P. C.
Havlin, S.
Peng, C. K.
Goldberger, A. L.
Stanley, H. E.
Date Acquired
August 21, 2013
Publication Date
February 26, 2001
Publication Information
Publication: Physical review letters
Volume: 86
Issue: 9
ISSN: 0031-9007
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: P41 RR13622
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Cardiopulmonary
Non-NASA Center

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