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Computational comparison of aortic root stresses in presence of stentless and stented aortic valve bio-prostheses

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  • M. G. C. Nestola
  • E. Faggiano
  • C. Vergara
  • R. M. Lancellotti
  • S. Ippolito
  • C. Antona
  • S. Filippi
  • A. Quarteroni
  • R. Scrofani

Abstract

We provide a computational comparison of the performance of stentless and stented aortic prostheses, in terms of aortic root displacements and internal stresses. To this aim, we consider three real patients; for each of them, we draw the two prostheses configurations, which are characterized by different mechanical properties and we also consider the native configuration. For each of these scenarios, we solve the fluid–structure interaction problem arising between blood and aortic root, through Finite Elements. In particular, the Arbitrary Lagrangian–Eulerian formulation is used for the numerical solution of the fluid-dynamic equations and a hyperelastic material model is adopted to predict the mechanical response of the aortic wall and the two prostheses. The computational results are analyzed in terms of aortic flow, internal wall stresses and aortic wall/prosthesis displacements; a quantitative comparison of the mechanical behavior of the three scenarios is reported. The numerical results highlight a good agreement between stentless and native displacements and internal wall stresses, whereas higher/non-physiological stresses are found for the stented case.

Suggested Citation

  • 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.
    • Handle: RePEc:taf:gcmbxx:v:20:y:2017:i:2:p:171-181
    DOI: 10.1080/10255842.2016.1207171
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    References listed on IDEAS

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    1. F. Auricchio & M. Conti & S. Morganti & A. Reali, 2014. "Simulation of transcatheter aortic valve implantation: a patient-specific finite element approach," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 17(12), pages 1347-1357, September.
    2. 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.
    3. Claudio García-Herrera & Diego Celentano & Marcela Cruchaga & Francisco Rojo & José Atienza & Gustavo Guinea & José Goicolea, 2012. "Mechanical characterisation of the human thoracic descending aorta: experiments and modelling," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 15(2), pages 185-193.
    4. A. Ferrara & A. Pandolfi, 2008. "Numerical modelling of fracture in human arteries," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 11(5), pages 553-567.
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    1. Martina Nicoletti & Letizia Chiodo & Alessandro Loppini, 2021. "Biophysics and Modeling of Mechanotransduction in Neurons: A Review," Mathematics, MDPI, vol. 9(4), pages 1-32, February.

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