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COMPUTATION OF BLOOD FLOW IN THE LEFT VENTRICLE WITH FLUID-STRUCTURE INTERACTION

Matthew G. Doyle
Department of Mechanical Engineering University of Ottawa 161 Louis Pasteur, Ottawa, Ontario K1N 6N5 Canada

Stavros Tavoularis
Department of Mechanical Engineering, University of Ottawa, Ottawa, Ontario KIN 6N5, Canada

Yves Bourgault
Department of Mathematics and Statistics University of Ottawa 585 King Edward, Ottawa, Ontario K1N 6N5 Canada

Аннотация

This paper describes the results of a simulation of blood flow and myocardium motion in an average canine left ventricle (LV) with fluid-structure interaction. The computed LV cavity pressure was in fair agreement with previous measurements over most of the cardiac cycle; however, during rapid filling, the calculated pressure was lower than the measured one, which led to non-physiological backflow. Trends of LV cavity volume changes were nearly physiological for three of the four phases of the cardiac cycle but the ejection fraction was lower than physiological. This method predicts appreciable pressure variations in the LV cavity, in contrast to solid-only simulations which assume uniform cavity pressure. The dependence of the results on various model parameters is briefly discussed along with suggestions for future work.