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Simulated elliptical bioprosthetic valve deformation: Implications for asymmetric transcatheter valve deployment  Wei Sun, Kewei Li, Eric Sirois  Journal.

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Presentation on theme: "Simulated elliptical bioprosthetic valve deformation: Implications for asymmetric transcatheter valve deployment  Wei Sun, Kewei Li, Eric Sirois  Journal."— Presentation transcript:

1 Simulated elliptical bioprosthetic valve deformation: Implications for asymmetric transcatheter valve deployment  Wei Sun, Kewei Li, Eric Sirois  Journal of Biomechanics  Volume 43, Issue 16, Pages (December 2010) DOI: /j.jbiomech Copyright © 2010 Elsevier Ltd Terms and Conditions

2 Fig. 1 The 23-mm outer-diameter symmetric TAV model with stent mesh: (a) side view and (b) top view. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © 2010 Elsevier Ltd Terms and Conditions

3 Fig. 2 Six elliptical models of asymmetric TAV. The first row is Scenario 1 with eccentricity of (a) 0.3, (b) 0.5, and (c) The second row is Scenario 2 with eccentricity of (d) 0.3, (e) 0.5, and (f) 0.68. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © 2010 Elsevier Ltd Terms and Conditions

4 Fig. 3 Polyhedral volume mesh of an elliptical TAV. Adaptive meshing was used along the leaflet surface and at the Nodule of Arantius. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © 2010 Elsevier Ltd Terms and Conditions

5 Fig. 4 Maximum principal stress distribution of fully loaded asymmetric TAV in Scenario 1 with eccentricity of (a) 0.3, (b) 0.5, and (c) 0.68 as well as Scenario 2 with eccentricity of (d) 0.3, (e) 0.5, and (f) 0.68. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © 2010 Elsevier Ltd Terms and Conditions

6 Fig. 5 Comparison of FE predicted peak maximum principal stresses and strains of TAVs; the e0-s0 TAV model is symmetric and all other TAV models are asymmetric. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © 2010 Elsevier Ltd Terms and Conditions

7 Fig. 6 (a) Flow velocity plot on the long-axis cross-section of the flow test chamber with the velocity jet at the central leakage hole. (b) Volumetric flow vs. transvalvular pressure for the three variations of elliptical TAVs. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © 2010 Elsevier Ltd Terms and Conditions

8 Fig. 7 Flat form leaflet geometry used to generate the nominal TAV model. Curve 1 is a straight line connecting the two commissures and curves 2–4 are different variations of the free edge curve, which were not investigated in this study. Journal of Biomechanics  , DOI: ( /j.jbiomech ) Copyright © 2010 Elsevier Ltd Terms and Conditions


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