Interventions for valvular disease and heart failure

A novel method to quantitate bioprosthetic valve leaflet mechanical stress: a numerical and in vitro study

EuroIntervention 2019;15:581-585. DOI: 10.4244/EIJ-D-19-00327

Viktória Stanová
Viktória Stanová1, MSc, Dipl.Ing; Yves Godio Raboutet1, MEng; Catherine Masson1, PhD; Max Py1, MEng; Paul Barragan2, MD; Lionel Thollon1, PhD; Régis Rieu1, PhD; Philippe Pibarot3, PhD, DVM
1. Aix Marseille Univ, IFSTTAR, LBA, Marseille, France; 2. Polyclinique Les Fleurs, Ollioules, France; 3. Quebec Heart and Lung Institute, Laval University, Quebec, Canada

An original in vitro/in silico method was developed to estimate the local and global mechanical stress applied on the bioprosthetic valve leaflet, which can be important for better understanding of the valve durability. A non-contact system based on stereophotogammetry and digital image correlation enabled filming and studying the valve leaflet movement frame by frame and performing three-dimensional analysis. The deformation was applied in a finite element model in order to calculate the local mechanical stress applied. High stress regions were primarily observed in the upper leaflet edge and belly and to a lesser extent at the free leaflet edge.

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