Imaging analysis of collagen fiber networks in cusps of porcine aortic valves: effect of their local distribution and alignment on valve functionality

Mor Mega, Gil Marom, Rotem Halevi, Ashraf Hamdan, Danny Bluestein, Rami Haj-Ali

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: The cusps of native aortic valve (AV) are composed of collagen bundles embedded in soft tissue, creating a heterogenic tissue with asymmetric alignment in each cusp. This study compares native collagen fiber networks (CFNs) with a goal to better understand their influence on stress distribution and valve kinematics. Images of CFNs from five porcine tricuspid AVs are analyzed and fluid-structure interaction models are generated based on them. Although the valves had similar overall kinematics, the CFNs had distinctive influence on local mechanics. The regions with dilute CFN are more prone to damage since they are subjected to higher stress magnitudes.

Original languageEnglish
Pages (from-to)1002-1008
Number of pages7
JournalComputer Methods in Biomechanics and Biomedical Engineering
Volume19
Issue number9
DOIs
StatePublished - 3 Jul 2015

Keywords

  • Collagen fibers
  • aortic valves
  • fluid-structure interaction
  • numerical model
  • porcine specific

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