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Current Directions in Biomedical Engineering

Joint Journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering

Editor-in-Chief: Dössel, Olaf

Editorial Board: Augat, Peter / Buzug, Thorsten M. / Haueisen, Jens / Jockenhoevel, Stefan / Knaup-Gregori, Petra / Kraft, Marc / Lenarz, Thomas / Leonhardt, Steffen / Malberg, Hagen / Penzel, Thomas / Plank, Gernot / Radermacher, Klaus M. / Schkommodau, Erik / Stieglitz, Thomas / Urban, Gerald A.


CiteScore 2018: 0.47

Source Normalized Impact per Paper (SNIP) 2018: 0.377

Open Access
Online
ISSN
2364-5504
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Fluid-structure interaction of heart valve dynamics in comparison to finite-element analysis

Finja Borowski
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  • Institute for ImplantatTechnology and Biomaterials e.V., Friedrich-Barnewitz- Str. 4, 18119 Rostock- Warnemünde, Germany
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/ Michael Sämann
  • Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Str. 4, 18119 Rostock- Warnemünde, Germany
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/ Sylvia Pfensig
  • Institute for ImplantatTechnology and Biomaterials e.V., Friedrich-Barnewitz-Str. 4, 18119 Rostock- Warnemünde, Germany
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/ Carolin Wüstenhagen
  • Institute for ImplantatTechnology and Biomaterials e.V., Friedrich-Barnewitz-Str. 4, 18119 Rostock- Warnemünde, Germany
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/ Robert Ott
  • Institute for ImplantatTechnology and Biomaterials e.V., Friedrich-Barnewitz-Str. 4, 18119 Rostock- Warnemünde, Germany
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/ Sebastian Kaule
  • Institute for ImplantatTechnology and Biomaterials e.V., Friedrich-Barnewitz-Str. 4, 18119 Rostock- Warnemünde, Germany
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/ Stefan Siewert
  • Institute for ImplantatTechnology and Biomaterials e.V., Friedrich-Barnewitz-Str. 4, 18119 Rostock- Warnemünde, Germany
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/ Niels Grabow
  • Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Str. 4, 18119 Rostock- Warnemünde, Germany
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/ Klaus-Peter Schmitz
  • Institute for Biomedical Engineering, Rostock University Medical Center, Friedrich-Barnewitz-Str. 4, 18119 Rostock- Warnemünde, Germany
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/ Michael Stiehm
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Published Online: 2018-09-22 | DOI: https://doi.org/10.1515/cdbme-2018-0063

Abstract

An established therapy for aortic valve stenosis and insufficiency is the transcatheter aortic valve replacement. By means of numerical simulation the valve dynamics can be investigated to improve the valve prostheses performance. This study examines the influence of the hemodynamic properties on the valve dynamics utilizing fluidstructure interaction (FSI) compared with results of finiteelement analysis (FEA). FEA and FSI were conducted using a previously published aortic valve model combined with a new developed model of the aortic root. Boundary conditions for a physiological pressurization were based on measurements of ventricular and aortic pressure from in vitro hydrodynamic studies of a commercially available heart valve prosthesis using a pulse duplicator system. A linear elastic behavior was assumed for leaflet material properties and blood was specified as a homogeneous, Newtonian incompressible fluid. The type of fluid domain discretization can be described with an arbitrary Lagrangian-Eulerian formulation. Comparison of significant points of time and the leaflet opening area were used to investigate the valve opening behavior of both analyses. Numerical results show that total valve opening modelled by FEA is faster compared to FSI by a factor of 5. In conclusion the inertia of the fluid, which surrounds the valve leaflets, has an important influence on leaflet deformation. Therefore, fluid dynamics should not be neglected in numerical analysis of heart valve prostheses.

Keywords: Transcatheter aortic valve replacement; fluidstructure interaction; finite-element analysis; Arbitrary Lagrangian-Eulerian formulation

About the article

Published Online: 2018-09-22

Published in Print: 2018-09-01


Citation Information: Current Directions in Biomedical Engineering, Volume 4, Issue 1, Pages 259–262, ISSN (Online) 2364-5504, DOI: https://doi.org/10.1515/cdbme-2018-0063.

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