Stress relaxation of heterogeneous myocardial tissue. Numerical experiments with 3D model

We present here the simple block model of a heterogeneous system describing the processes of stress relaxation in spatial and mechanically heterogeneous myocardial tissue. In numerical experiments by the model it is established that to obtain the same level of tension as in the case of a uniform mod...

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Bibliographic Details
Published in:Biophysics (Oxford) 2012-11, Vol.57 (6), p.804-807
Main Authors: Smoluk, A. T., Smoluk, L. T., Protsenko, Y. L.
Format: Article
Language:English
Subjects:
Biological and Medical Physics
Biophysics
Complex Systems Biophysics
Heart
Numerical analysis
Physics
Physics and Astronomy
Stress relaxation
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Summary:We present here the simple block model of a heterogeneous system describing the processes of stress relaxation in spatial and mechanically heterogeneous myocardial tissue. In numerical experiments by the model it is established that to obtain the same level of tension as in the case of a uniform model, less stiff and less viscous heterogeneous blocks are required. It is shown that in the model of heterogeneous myocardial tissue one observes not only stress relaxation but also strain relaxation—creep. Notably, step-by-step adjustment of the neighbor structural blocks in response to the whole model deformation takes place. Furthermore, stationary deformation properties of separated blocks become nonlinear.
ISSN:0006-3509
1555-6654
DOI:10.1134/S0006350912060176