Image-based estimation of strains after aortic valve stent implantation

Michael Gessat, Raoul Hopf, Thomas Pollok, Edoardo Mazza, and Volkmar Falk
6th European Congress on Computational Methods in Applied Sciences and Engineering
September 2012

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Abstract

Transcatheter Aortic Valve Implantation (TAVI) is a safe and effective alternative to conventional treatment of high-risk patients with severe aortic stenosis. A stented xenograft valve is implanted inside the native aortic valve, pushing the leaflets and calcifications on the leaflet against the vascular wall. A tight fit between the stent and the surrounding tissues is required to prevent paravalvular aortic insufficiency (AI) after TAVI. Exceeding forces on the aortic annuls can lead to ruptures or impede conduction of activation potentials through the artrioventricular node, resulting in arrhythmia. The mechanical situation of the stent after TAVI as well as the biomechanics of the aortic wall and valvar leaflets are understood in principle. Yet, no clinical data exists about the amount of force which is required to avoid AI or conduction abnormalities. Our work aims at developing a method for evaluating the mechanical situation in patients after TAVI based on medical imaging.

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Download in pdf format

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@InProceedings{eth_biwi_01008,
  author = {Michael Gessat and Raoul Hopf and Thomas Pollok and Edoardo Mazza and and Volkmar Falk},
  title = {Image-based estimation of strains after aortic valve stent implantation},
  booktitle = {6th European Congress on Computational Methods in Applied Sciences and Engineering},
  year = {2012},
  month = {September},
  keywords = {}
}