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Related Experiment Videos

Myocardial material parameter estimation-a comparative study for simple shear.

H Schmid1, M P Nash, A A Young

  • 1Bioengineering Institute, University of Auckland, Auckland, New Zealand. h.schmid@auckland.ac.nz

Journal of Biomechanical Engineering
|September 26, 2006
PubMed
Summary
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Accurate constitutive laws are vital for understanding ventricular mechanics. This study evaluates five laws based on fit, determinability, and parameter variability to guide selection for cardiac muscle modeling.

Area of Science:

  • Cardiovascular Physiology
  • Biomechanical Engineering
  • Materials Science

Background:

  • Ventricular mechanics analysis relies on accurate constitutive laws for passive cardiac muscle.
  • Cardiac muscle exhibits complex nonlinear and anisotropic properties.
  • Existing constitutive laws require rigorous evaluation for reliable stress-strain behavior modeling.

Purpose of the Study:

  • To compare five constitutive laws for passive cardiac muscle.
  • To evaluate laws based on goodness of fit, parameter determinability, and variability.
  • To inform the selection of appropriate constitutive models for ventricular mechanics.

Main Methods:

  • Fitting five proposed constitutive laws to experimental shear deformation data.
  • Assessing the goodness of fit to experimental stress-strain measurements.

Related Experiment Videos

  • Analyzing the determinability of the objective function and the variability of material parameters.

    • Main Results:

    • Quantitative comparison of the five laws across the defined criteria.
    • Identification of strengths and weaknesses for each constitutive model.
    • Insights into the reliability of material parameter estimation.

    Conclusions:

    • The choice of constitutive law significantly impacts the accuracy of ventricular mechanics simulations.
    • Specific laws demonstrate superior performance in fitting experimental data and parameter determination.
    • This evaluation provides a framework for selecting robust constitutive models in cardiac biomechanics research.