Phase shifts of synchronized oscillators and the systolic-diastolic blood pressure relation.
Phys Rev E Stat Nonlin Soft Matter Phys
; 69(6 Pt 1): 061923, 2004 Jun.
Article
en En
| MEDLINE
| ID: mdl-15244633
ABSTRACT
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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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Sístole
/
Relojes Biológicos
/
Presión Sanguínea
/
Flujo Pulsátil
/
Diástole
/
Modelos Cardiovasculares
Límite:
Humans
/
Middle aged
Idioma:
En
Revista:
Phys Rev E Stat Nonlin Soft Matter Phys
Asunto de la revista:
BIOFISICA
/
FISIOLOGIA
Año:
2004
Tipo del documento:
Article
País de afiliación:
Italia