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Fluid-Structure Interaction Analysis of Papillary Muscle Forces Using a Comprehensive Mitral Valve Model with 3D

Milan Toma¹, Morten Ø Jensen¹, Daniel R Einstein²

¹Department of Biomedical Engineering, Georgia Institute of Technology, Technology Enterprise Park, Suite 200, 387 Technology Circle, Atlanta, GA, 30313-2412, USA.

Annals of Biomedical Engineering

|July 18, 2015

Summary

Researchers validated computational models for heart valve biomechanics using an in vitro system. This improves the accuracy of fluid-structure interaction simulations for designing medical devices.

Keywords:

Chordal structure Comprehensive computational model Fluid–structure interaction Forces Mitral valve Papillary muscle

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Area of Science:

Biomedical Engineering
Computational Fluid Dynamics
Medical Device Design

Background:

Numerical models are crucial for studying heart valve biomechanics and developing medical devices.
Current challenges include accurately implementing boundary conditions in fluid-structure interaction (FSI) simulations.
Advanced in vitro systems are needed to validate these complex computational models.

Purpose of the Study:

To validate fluid-structure interaction (FSI) conditions for mitral valve computational models.
To enhance the accuracy of biomechanical simulations for heart valve repair and replacement devices.
To bridge the gap between experimental data and computational predictions in cardiovascular research.

Main Methods:

Utilized an advanced in vitro system with explanted ovine mitral valves.
Acquired structural data using micro-computed tomography ([Formula: see text]CT).
Validated computational FSI models by comparing simulated hemodynamic data, leaflet dynamics, and force vectors with in vitro experimental results.

Main Results:

The computational model accurately matched the in vitro total force of 2.6 N per papillary muscle.
Experimental data from the in vitro system successfully validated the FSI computational model.
Demonstrated the ability to adjust material parameters using in vitro and in vivo force measurements for improved model accuracy.

Conclusions:

In vitro validation is essential for improving the accuracy of computational biomechanical models.
Validated FSI simulations can provide insights not obtainable through experiments alone.
This approach enhances the reliability of computational models for designing cardiovascular medical devices and understanding valve biomechanics.