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Fluid-structure interaction and structural analyses using a comprehensive mitral valve model with 3D chordal

Milan Toma1, Daniel R Einstein2, Charles H Bloodworth1

  • 1Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Technology Enterprise Park, Suite 200, 387 Technology Circle, Atlanta, 30313-2412, GA, U.S.A.

International Journal for Numerical Methods in Biomedical Engineering
|June 26, 2016
PubMed
Summary
This summary is machine-generated.

New 3D mitral valve models reveal a continuous webbed structure, challenging traditional assumptions. Accurate modeling requires fluid-structure interaction analysis for a comprehensive understanding of mitral valve mechanics.

Keywords:
chordae tendineaechordal structurecomprehensive computational modelfluid-structure interactionforcesmitral valvepapillary muscle

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Mechanics
  • Computational Biology

Background:

  • Traditional 3D mitral valve models simplify anatomy, treating leaflets as membranes and chordae as separate cables.
  • Recent high-resolution imaging reveals a continuous, webbed structure where chordae and leaflets are integrated.

Purpose of the Study:

  • To investigate the necessity of fluid-structure interaction (FSI) analysis for accurate mitral valve modeling.
  • To re-examine the role of mitral valve chordae in valve mechanics using advanced modeling techniques.

Main Methods:

  • Development of subject-specific, anatomically accurate 3D models using solid elements for the entire valve apparatus.
  • Implementation of fluid-structure interaction (FSI) analysis to simulate quasi-static mechanics.
  • Evaluation of computational feasibility using GPU computing advancements.

Main Results:

  • Demonstrated that fully resolved 3D mitral valve models require FSI for correct loading, even in quasi-static conditions.
  • Showcased that advanced GPU computing makes complex FSI models computationally tractable.
  • Challenged the conventional practice of analyzing leaflets independently of chordae.

Conclusions:

  • Accurate 3D mitral valve modeling necessitates a shift towards integrated, web-like structural representations.
  • Fluid-structure interaction analysis is crucial for understanding mitral valve mechanics, including the role of chordae.
  • Computational advancements enable the use of sophisticated FSI models for in-depth cardiovascular research.