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Aortic valve leaflet mechanical properties facilitate diastolic valve function

Author

Listed:
  • T.M. Koch
  • B.D. Reddy
  • P. Zilla
  • T. Franz

Abstract

This work was concerned with the numerical simulation of the behaviour of aortic valves whose material can be modelled as non-linear elastic anisotropic. Linear elastic models for the valve leaflets with parameters used in previous studies were compared with hyperelastic models, incorporating leaflet anisotropy with pronounced stiffness in the circumferential direction through a transverse isotropic model. The parameters for the hyperelastic models were obtained from fits to results of orthogonal uniaxial tensile tests on porcine aortic valve leaflets. The computational results indicated the significant impact of transverse isotropy and hyperelastic effects on leaflet mechanics; in particular, increased coaptation with peak values of stress and strain in the elastic limit. The alignment of maximum principal stresses in all models follows approximately the coarse collagen fibre distribution found in aortic valve leaflets. The non-linear elastic leaflets also demonstrated more evenly distributed stress and strain which appears relevant to long-term scaffold stability and mechanotransduction.

Suggested Citation

  • T.M. Koch & B.D. Reddy & P. Zilla & T. Franz, 2010. "Aortic valve leaflet mechanical properties facilitate diastolic valve function," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 13(2), pages 225-234.
    • Handle: RePEc:taf:gcmbxx:v:13:y:2010:i:2:p:225-234
    DOI: 10.1080/10255840903120160
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    Cited by:

    1. Siyao Huang & Hsiao-Ying Shadow Huang, 2014. "Virtualisation of stress distribution in heart valve tissue," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 17(15), pages 1696-1704, November.
    2. M. G. C. Nestola & E. Faggiano & C. Vergara & R. M. Lancellotti & S. Ippolito & C. Antona & S. Filippi & A. Quarteroni & R. Scrofani, 2017. "Computational comparison of aortic root stresses in presence of stentless and stented aortic valve bio-prostheses," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 20(2), pages 171-181, January.

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