A novel heart valve stent design: Mechanical interaction with the aortic root

Frederic Heim, Coralie Marchand, Bernard Durand, Nabil Chakfe

Research output: Contribution to journalArticlepeer-review

Abstract

Percutaneous aortic valve implantation has become an alternative technique to surgical valve replacement in patients with high risk for open chest surgery. Vascular stents clinically used today for non-invasive aortic valve replacement tend, however, to impede the dimension changes of the compliant aortic root over the cardiac cycle. The purpose of the present work is to assess the influence of a novel heart valve stent, designed specifically to limit the traumatism in tissue, on the compliance of the aortic root. A theoretical approach is adopted to model the mechanical behaviour of the different stent parts and assess the compliance modification induced by the stent. The validity of the model is then tested experimentally. Both approaches show that the specific geometry of the stent makes it possible to keep the compliance of the aortic root close to the native root values.

Original languageEnglish (US)
Pages (from-to)157-165
Number of pages9
JournalComputer Methods in Biomechanics and Biomedical Engineering
Volume15
Issue number2
DOIs
StatePublished - Feb 2012

Keywords

  • Heart valve prosthesis
  • Nitinol
  • Non-invasive
  • Stent

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering
  • Human-Computer Interaction
  • Computer Science Applications

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