| Phase shifts of synchronized oscillators and the systolic-diastolic blood pressure relation. | |
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MedLine Citation:
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PMID: 15244633 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We study the phase-synchronization properties of systolic and diastolic arterial pressure in healthy subjects. We find that delays in the oscillatory components of the time series depend on the frequency bands that are considered, in particular we find a change of sign in the phase shift going from the very low frequency band to the high frequency band. This behavior should reflect a collective behavior of a system of nonlinear interacting elementary oscillators. We prove that some models describing such systems, e.g., the Winfree and the Kuramoto models, offer a clue to this phenomenon. For these theoretical models there is a linear relationship between phase shifts and the difference of natural frequencies of oscillators and a change of sign in the phase shift naturally emerges. |
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Authors:
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L Angelini; G Lattanzi; R Maestri; D Marinazzo; G Nardulli; L Nitti; M Pellicoro; G D Pinna; S Stramaglia |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Validation Studies Date: 2004-06-23 |
Journal Detail:
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Title: Physical review. E, Statistical, nonlinear, and soft matter physics Volume: 69 ISSN: 1539-3755 ISO Abbreviation: Phys Rev E Stat Nonlin Soft Matter Phys Publication Date: 2004 Jun |
Date Detail:
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Created Date: 2004-07-12 Completed Date: 2004-09-28 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 101136452 Medline TA: Phys Rev E Stat Nonlin Soft Matter Phys Country: United States |
Other Details:
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Languages: eng Pagination: 061923 Citation Subset: IM |
Affiliation:
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TIRES-Center of Innovative Technologies for Signal Detection and Processing, Università di Bari, Bari, Italy. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Biological Clocks
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physiology* Blood Pressure / physiology* Computer Simulation Diastole / physiology* Humans Middle Aged Models, Cardiovascular* Periodicity Pulsatile Flow / physiology* Systole / physiology* |
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