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Mitral valve dynamics in structural and fluid-structure interaction models

Lau, KD; Diaz, V; Scambler, P; Burriesci, G; (2010) Mitral valve dynamics in structural and fluid-structure interaction models. MED ENG PHYS , 32 (9) 1057 - 1064. 10.1016/j.medengphy.2010.07.008. Gold open access

Abstract

Modelling and simulation of heart valves is a challenging biomechanical problem due to anatomical variability pulsatile physiological pressure loads and 3D anisotropic material behaviour Current valvular models based on the finite element method can be divided into those that do model the interaction between the blood and the valve (fluid-structure interaction or wet models) and those that do not (structural models or dry models)Here an anatomically sized model of the antral valve has been used to compare the difference between structural and fluid-structure interaction techniques in two separately simulated scenarios valve closure and a cardiac cycle Using fluid-structure interaction the valve has been modelled separately in a straight tubular volume and in a U-shaped ventricular volume in order to analyse the difference in the coupled fluid and structural dynamics between the two geometriesThe results of the structural and fluid-structure interaction models have shown that the stress distribution in the closure simulation is similar in all the models but the magnitude and closed configuration differ In the cardiac cycle simulation significant differences in the valvular dynamics were found between the structural and fluid-structure interaction models due to difference in applied pressure loads Comparison of the fluid domains of the fluid-structure interaction models have shown that the ventricular geometry generates slower fluid velocity with increased vorticity compared to the tubular geometryIn conclusion structural heart valve models are suitable for simulation of static configurations (opened or closed valves) but in order to simulate full dynamic behaviour fluid-structure interaction models are required (C) 2010 IPEM Published by Elsevier Ltd All rights reserved

Type: Article
Title: Mitral valve dynamics in structural and fluid-structure interaction models
Open access status: An open access publication
DOI: 10.1016/j.medengphy.2010.07.008
Publisher version: http://www.ncbi.nlm.nih.gov/pmc/ articles/PMC29894...
Keywords: Biomechanics, Finite element, Fluid-structure interaction, Heart valves, Mitral valve, FINITE-ELEMENT
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > UCL GOS Institute of Child Health
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > UCL GOS Institute of Child Health > ICH Development Bio and Cancer Prog
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/119117
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