A Constitutive Description of Contracting Papillary Muscle and Its Implications to the Dynamics of the Intact Heart

[+] Author and Article Information
J. G. Pinto

Biodynamics Laboratory, Department of Mechanical Engineering, San Diego State University, San Diego, Calif. 92182-0191

J Biomech Eng 109(3), 181-191 (Aug 01, 1987) (11 pages) doi:10.1115/1.3138668 History: Received May 28, 1986; Revised May 29, 1987; Online June 12, 2009


A simple mathematical model capable of simulating the major biomechanical attributes of contracting cardiac muscle is presented. This model is based on the phenomenological observations on heart muscle. The form of the equation can be readily extended to describe the pressure-volume-time-velocity of the intact heart as well, thus allowing a direct bridge between the dynamics of papillary muscle and the dynamics of intact heart. Parameters that are sensitive to inotropic state of the muscle can be obtained directly from the isometric tension-time record of the muscle or the isovolumic pressure-time record of the ventricle. These parameters have the potential to serve as quantitative measures of cardiac health.

Copyright © 1987 by ASME
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