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The Effects of leaflet material properties on the simulated function of regurgitant mitral valves

Advances in three-dimensional imaging provide the ability to construct and analyze finite element (FE) models to evaluate the biomechanical behavior and function of atrioventricular valves. However, while obtaining patient-specific valve geometry is now possible, non-invasive measurement of patient-...

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Autores principales: Wu, Wensi, Ching, Stephen, Sabin, Patricia, Laurence, Devin W., Maas, Steve A., Lasso, Andras, Weiss, Jeffrey A., Jolley, Matthew A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cornell University 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9934730/
https://www.ncbi.nlm.nih.gov/pubmed/36798457
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author Wu, Wensi
Ching, Stephen
Sabin, Patricia
Laurence, Devin W.
Maas, Steve A.
Lasso, Andras
Weiss, Jeffrey A.
Jolley, Matthew A.
author_facet Wu, Wensi
Ching, Stephen
Sabin, Patricia
Laurence, Devin W.
Maas, Steve A.
Lasso, Andras
Weiss, Jeffrey A.
Jolley, Matthew A.
author_sort Wu, Wensi
collection PubMed
description Advances in three-dimensional imaging provide the ability to construct and analyze finite element (FE) models to evaluate the biomechanical behavior and function of atrioventricular valves. However, while obtaining patient-specific valve geometry is now possible, non-invasive measurement of patient-specific leaflet material properties remains nearly impossible. Both valve geometry and tissue properties play a significant role in governing valve dynamics, leading to the central question of whether clinically relevant insights can be attained from FE analysis of atrioventricular valves without precise knowledge of tissue properties. As such we investigated 1) the influence of tissue extensibility and 2) the effects of constitutive model parameters and leaflet thickness on simulated valve function and mechanics. We compared metrics of valve function (e.g., leaflet coaptation and regurgitant orifice area) and mechanics (e.g., stress and strain) across one normal and three regurgitant mitral valve (MV) models with common mechanisms of regurgitation (annular dilation, leaflet prolapse, leaflet tethering) of both moderate and severe degree. We developed a novel fully-automated approach to accurately quantify regurgitant orifice areas of complex valve geometries. We found that the relative ordering of the mechanical and functional metrics was maintained across a group of valves using material properties up to 15% softer than the representative adult mitral constitutive model. Our findings suggest that FE simulations can be used to qualitatively compare how differences and alterations in valve structure affect relative atrioventricular valve function even in populations where material properties are not precisely known.
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spelling pubmed-99347302023-02-17 The Effects of leaflet material properties on the simulated function of regurgitant mitral valves Wu, Wensi Ching, Stephen Sabin, Patricia Laurence, Devin W. Maas, Steve A. Lasso, Andras Weiss, Jeffrey A. Jolley, Matthew A. ArXiv Article Advances in three-dimensional imaging provide the ability to construct and analyze finite element (FE) models to evaluate the biomechanical behavior and function of atrioventricular valves. However, while obtaining patient-specific valve geometry is now possible, non-invasive measurement of patient-specific leaflet material properties remains nearly impossible. Both valve geometry and tissue properties play a significant role in governing valve dynamics, leading to the central question of whether clinically relevant insights can be attained from FE analysis of atrioventricular valves without precise knowledge of tissue properties. As such we investigated 1) the influence of tissue extensibility and 2) the effects of constitutive model parameters and leaflet thickness on simulated valve function and mechanics. We compared metrics of valve function (e.g., leaflet coaptation and regurgitant orifice area) and mechanics (e.g., stress and strain) across one normal and three regurgitant mitral valve (MV) models with common mechanisms of regurgitation (annular dilation, leaflet prolapse, leaflet tethering) of both moderate and severe degree. We developed a novel fully-automated approach to accurately quantify regurgitant orifice areas of complex valve geometries. We found that the relative ordering of the mechanical and functional metrics was maintained across a group of valves using material properties up to 15% softer than the representative adult mitral constitutive model. Our findings suggest that FE simulations can be used to qualitatively compare how differences and alterations in valve structure affect relative atrioventricular valve function even in populations where material properties are not precisely known. Cornell University 2023-04-25 /pmc/articles/PMC9934730/ /pubmed/36798457 Text en https://creativecommons.org/licenses/by/4.0/This work is licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/) , which allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use.
spellingShingle Article
Wu, Wensi
Ching, Stephen
Sabin, Patricia
Laurence, Devin W.
Maas, Steve A.
Lasso, Andras
Weiss, Jeffrey A.
Jolley, Matthew A.
The Effects of leaflet material properties on the simulated function of regurgitant mitral valves
title The Effects of leaflet material properties on the simulated function of regurgitant mitral valves
title_full The Effects of leaflet material properties on the simulated function of regurgitant mitral valves
title_fullStr The Effects of leaflet material properties on the simulated function of regurgitant mitral valves
title_full_unstemmed The Effects of leaflet material properties on the simulated function of regurgitant mitral valves
title_short The Effects of leaflet material properties on the simulated function of regurgitant mitral valves
title_sort effects of leaflet material properties on the simulated function of regurgitant mitral valves
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9934730/
https://www.ncbi.nlm.nih.gov/pubmed/36798457
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