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Development of a Computational Method for Simulating Tricuspid Valve Dynamics.

Shelly Singh-Gryzbon1, Vahid Sadri1, Milan Toma1,2

  • 1The Wallace H. Coulter School of Biomedical Engineering, Georgia Institute of Technology & Emory University, Technology Enterprise Park, 387 Technology Circle, Atlanta, GA, 30313-2412, USA.

Annals of Biomedical Engineering
|March 13, 2019
PubMed
Summary
This summary is machine-generated.

This study developed a computational model of the tricuspid valve (TV) to analyze its biomechanics. The model revealed increased stress and strain in a regurgitant TV, aiding future research on TV repairs.

Keywords:
BiomechanicsFluid–structure interactionMicro-CTSPHTricuspid regurgitation

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Area of Science:

  • Cardiovascular Biomechanics
  • Computational Biology
  • Medical Imaging

Background:

  • Understanding tricuspid valve (TV) biomechanics is crucial for diagnosing and treating valve diseases.
  • Current knowledge is supplemented by benchtop and animal studies, but computational models offer deeper insights.

Purpose of the Study:

  • To develop a computational model of the TV using micro-computed tomography (μCT) imaging and fluid-structure interaction (FSI) simulations.
  • To validate the model against anatomical data and use it to simulate regurgitant TV morphology.

Main Methods:

  • A 3D TV model was reconstructed from μCT images of a porcine TV.
  • Non-linear stress-strain relations and chordal properties were implemented for leaflet behavior.
  • FSI simulations were performed to analyze valve closure and regurgitant morphology.

Main Results:

  • The computational model accurately replicated TV closure dynamics and coaptation zones.
  • Simulations of a regurgitant TV showed a 7% increase in mean stress in the leaflet belly and 9% higher maximum principal strain.
  • Regurgitant TV chordae tendinae experienced a 3% increase in mean stress.

Conclusions:

  • The developed computational model provides a valuable tool for understanding TV biomechanics.
  • This model can aid in the investigation of TV diseases and the development of percutaneous repair strategies.