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A simple cycle-averaged model for cardiovascular dynamics.

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1
Laboratory for Electromagn. & Electron. Syst., MIT, Cambridge, MA.

Abstract

Lumped-parameter time-varying electrical circuit analogs for cardiovascular systems are frequently used in computational models for simulating and analyzing hemodynamics. These pulsatile models provide details of the beat-by-beat or intracycle dynamics. In other settings, however, such as when tracking a hospital patient's hemodynamic state over time, it is more useful to track trends in the intercycle dynamics. In this paper, we apply a cycle-averaging method to a simple pulsatile cardiovascular model to derive a cycle-averaged model for cardiovascular dynamics. The resulting cycle-averaged model captures the intercycle dynamics with relatively small approximation errors for a large range of perturbations in parameters such as systemic vascular resistance.

PMID:
17281496
DOI:
10.1109/IEMBS.2005.1615726
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