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The Journal of Thoracic and Cardiovascular Surgery, Vol 79, 402-412, Copyright © 1980 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Computer simulation: a diagnostic method in comparative studies of valve prostheses

MS Engelman, SE Moskowitz and JB Borman

Computer simulation was used to compare flow characteristics through Starr-Edwards and Bjork-Shiley valves in the mitral and aortic positions. Pressure and velocity determinations were mathematically computed with the use of a model based on the recognition that blood is a non-Newtonian fluid. The results were displayed in two-dimensional graphic form. In both the mitral and aortic positions the Bjork-Shiley prosthesis showed a more favorable laminar flow pattern, producing fewer eddies and smaller pressure and velocity gradients through the occluder. Computer simulation is a valuable adjunct in the comparative testing of the hemodynamic properties of artificial heart valves and offers several advantages over physical simulators.




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Copyright © 1980 by The American Association for Thoracic Surgery.