New cardiovascular indices based on nonlinear spectral analysis of arterial blood pressure waveforms

Abstract : A new method for analyzing arterial blood pressure is presented in this article. The technique is based on the scattering transform and consists in solving the spectral problem associated to a one-dimensional Schrödinger operator with a potential depending linearly upon the pressure. This potential is then expressed with the discrete spectrum which includes negative eigenvalues and corresponds to the interacting components of an N-soliton. The approach is similar to a nonlinear Fourier transform where the solitons play the role of sine and cosine components. The method provides new cardiovascular indices that seem to have meaningful physiological information, especially about the stroke volume and the ventricular contractility. We first show how to reconstruct the arterial blood pressure waves and separate its systolic and diastolic phases using this approach. Then we analyse the parameters computed from this technique in two physiological conditions, the head-up 60 degrees tilt test and the isometric handgrip test, widely used for studying short term cardiovascular control. Promising results are obtained.
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https://hal.inria.fr/inria-00158653
Contributeur : Taous-Meriem Laleg-Kirati <>
Soumis le : vendredi 29 juin 2007 - 11:20:02
Dernière modification le : jeudi 11 janvier 2018 - 06:12:18
Document(s) archivé(s) le : lundi 24 septembre 2012 - 10:45:52

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Taous-Meriem Laleg, Claire Médigue, Yves Papelier, Emmanuelle Crépeau, Michel Sorine. New cardiovascular indices based on nonlinear spectral analysis of arterial blood pressure waveforms. 2007. 〈inria-00158653〉

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