Assessment of Left Ventricular Flow Dynamics Using the Finite Analytic Method: Potential for Clinical Applicationsby Richard T. Schoephoerster, Florida Int Univ, Miami, United States,
Cesar Silva, Florida Int Univ, Miami, United States,
Gautam Ray, Florida Int Univ, Miami, United States,
Abstract: Left ventricular (LV) function is traditionally assessed from chamber wall motion, rheological properties of the myocardium, and invasive measurements of chamber pressure. In order to gain an understanding of the LV flow and for initial correlations of simulated LV malfunctions with flow dynamics, we have performed a numerical analysis of the flow in a two dimensional rectangular chamber simulating LV for both normal and abnormal wall motion (Schoephoerster and Ray, 1990). The numerical solutions were obtained by discretizing the 2-D Navier-Stokes equations for viscous, incompressible unsteady fluid flow using the Finite Analytic (FA) technique. In this paper, flow patterns in the LV chamber during systole have been obtained using wall motion boundary conditions obtained from cine-angiography for both a normal LV and one with coronary artery disease. A diagnostic index based on the flow pattern has also been suggested.
Subject Headings: Two-dimensional flow | Flow simulation | Walls | Motion (dynamics) | Numerical models | Two-dimensional analysis | Two-dimensional models
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