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Fluctuations in a coupled-oscillator model of the cardiovascular system.

Gonzalez, Jorge A. and Suarez–Vargas, Jose J. and Stefanovska, Aneta and McClintock, Peter V. E. (2007) Fluctuations in a coupled-oscillator model of the cardiovascular system. In: PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE). PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE), 6602 (66020Y). SPIE-INT SOC OPTICAL ENGINEERING, Bellingham, Washington, USA. ISBN 978-0-8194-6739-3

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Abstract

We present a model of the cardiovascular system (CVS) based on a system of coupled oscillators. Using this approach we can describe several complex physiological phenomena that can have a range of applications. For instance, heart rate variability (HRV), can have a new deterministic explanation. The intrinsic dynamics of the HRV is controlled by deterministic couplings between the physiological oscillators in our model and without the need to introduce external noise as is commonly done. This new result provides potential applications not only for physiological systems but also for the design of very precise electronic generators where the frequency stability is crucial. Another important phenomenon is that of oscillation death. We show that in our CVS model the mechanism leading to the quenching of the oscillations can be controlled, not only by the coupling parameter, but by a more general scheme. In fact, we propose that a change in the relative current state of the cardiovascular oscillators can lead to a cease of the oscillations without actually changing the strength of the coupling among them. We performed real experiments using electronic oscillators and show them to match the theoretical and numerical predictions. We discuss the relevance of the studied phenomena to real cardiovascular systems regimes, including the explanation of certain pathologies, and the possible applications in medical practice.

Item Type: Contribution in Book/Report/Proceedings
Additional Information: NOISE AND FLUCTUATIONS IN BIOLOGICAL, BIOPHYSICAL, AND BIOMEDICAL SYSTEMS
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 11268
Deposited By: Dr Aneta Stefanovska
Deposited On: 06 Aug 2008 21:38
Refereed?: No
Published?: Published
Last Modified: 09 Apr 2014 20:33
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/11268

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