Three-Dimensional Analysis of Left Ventricular Ejection Using Computational Fluid Dynamics

[+] Author and Article Information
Tad W. Taylor, Haruka Okino, Takami Yamaguchi

Department of Bio-Medical Engineering, School of High-Technology for Human Welfare, Tokai University, 317 Nishino, Numazu, Shizuoka 410-03, Japan

J Biomech Eng 116(1), 127-130 (Feb 01, 1994) (4 pages) doi:10.1115/1.2895696 History: Received June 10, 1992; Revised December 11, 1992; Online March 17, 2008


We present in this study a method for constructing computational fluid mechanical models in order to study the effects of time-varying left ventricular ejection. A spherical left ventricular model was implemented in which three dimensional flow fields were obtained. The time course of the ventricular wall changes were assumed to have a trigonometrically varying nature. The wall grid was reformed 25 times during the calculation since the left ventricular wall motion was assumed to follow the blood flow, and the ventricle wall radius was reduced by 60 percent in 0.25 seconds. Centerline and cross-sectional velocity vectors greatly increased in magnitude at the aortic outlet, and pressure dropped from 1.17 × 104 dynes/cm2 (8.8 mmHg) to zero in the top 10 percent of the heart. The modeling framework will be used with left ventricular cast data coordinates in future studies. There is presently a lack of three-dimensional data based on a realistic model, and the computational method should make it possible to compare simulation results with important measurement techniques such as echocardiography and magnetic resonance imaging.

Copyright © 1994 by The American Society of Mechanical Engineers
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