Modelling couplings among the oscillators of the cardiovascular system.

Stefanovska, A; Luchinsky, D G; McClintock, P V

Stefanovska, A; Luchinsky, D G; McClintock, P V.

Afiliación

Stefanovska A; Group of Nonlinear Dynamics and Synergetics. Faculty of Electrical Engineering, University of Ljubljana, Slovenia. aneta@osc.fe.uni-lj.si

Physiol Meas ; 22(3): 551-64, 2001 Aug.

Article en En | MEDLINE | ID: mdl-11556674

RESUMEN

A mathematical model of the cardiovascular system is simulated numerically. The basic unit in the model is an oscillator that possesses a structural stability and robustness motivated by physiological understanding and by the analysis of measured time series. Oscillators with linear couplings are found to reproduce the main characteristic features of the experimentally obtained spectra. To explain the variability of cardiac and respiratory frequencies, however, it is essential to take into account the rest of the system, i.e. to consider the effect of noise. It is found that the addition of noise also results in epochs of synchronization, as observed experimentally. Preliminary analysis suggests that there is a mixture of linear and parametric couplings, but that the linear coupling seems to dominate.

Asunto(s)

Modelos Cardiovasculares; Periodicidad; Artefactos; Presión Sanguínea/fisiología; Frecuencia Cardíaca/fisiología; Humanos; Dinámicas no Lineales; Flujo Sanguíneo Regional/fisiología; Procesos Estocásticos

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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Periodicidad / Modelos Cardiovasculares Tipo de estudio: Prognostic_studies Límite: Humans Idioma: En Revista: Physiol Meas Asunto de la revista: BIOFISICA / ENGENHARIA BIOMEDICA / FISIOLOGIA Año: 2001 Tipo del documento: Article País de afiliación: Eslovenia Pais de publicación: Reino Unido

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