Nonquasi-Steady Character of Pulsatile Flow in Human Coronary Arteries

[+] Author and Article Information
F. F. Mark, C. B. Bargeron, O. J. Deters, M. H. Friedman

The Johns Hopkins University, Applied Physics Laboratory, Laurel, Md. 20707

J Biomech Eng 107(1), 24-28 (Feb 01, 1985) (5 pages) doi:10.1115/1.3138514 History: Received October 25, 1983; Revised March 01, 1984; Online June 15, 2009


This experiment was conducted to determine if the pulsatile flow through the proximal portion of the left coronary artery system in man exhibits quasi-steady characteristics. Steady and pulsatile flows were passed through an idealized model whose dimensions were based on a vascular cast. The mean Reynolds number was 180 and the unsteadiness number was 2.7. Velocity profiles were measured by laser Doppler anemometry at several locations along diameters in the parent and both daughter channels in the neighborhood of the “left main” bifurcation. Analysis of the results along one diameter in the “left main” channel shows that unsteady flow in the larger coronary arteries may not be simulated by a series of steady flow experiments.

Copyright © 1985 by ASME
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