Document Detail


Aortic root performance after valve sparing procedure: a comparative finite element analysis.
MedLine Citation:
PMID:  18786848     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
David and Yacoub sparing techniques are the most common procedures adopted for the surgical correction of aortic root aneurysms. These surgical procedures entail the replacement of the sinuses of Valsalva with a synthetic graft, inside which the cusps are re-suspended. Root replacement by a synthetic graft may result in altered valve behaviour both in terms of coaptation and stress distribution, thus leading to the failure of the correction. A finite element approach was used to investigate this phenomenon; four 3D models of the aortic root were developed to simulate the root in physiological, pathological and post-operative conditions after the two different surgical procedures. The physiological 3D geometrical model was developed on the basis of anatomical data obtained from echocardiographic images; it was then modified to obtain the pathological and post-operative models. The effectiveness of both techniques was assessed by comparison with the first two simulated conditions, in terms of stresses acting on the root, leaflet coaptation and interaction between leaflets and the graft during valve opening. Results show that both sparing techniques are able to restore aortic valve coaptation and to reduce stresses induced by the initial root dilation. Nonetheless, both techniques lead to altered leaflet kinematics, with more evident alterations after David repair.
Authors:
Monica Soncini; Emiliano Votta; Silvia Zinicchino; Valeria Burrone; Andrea Mangini; Massimo Lemma; Carlo Antona; Alberto Redaelli
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2008-09-10
Journal Detail:
Title:  Medical engineering & physics     Volume:  31     ISSN:  1350-4533     ISO Abbreviation:  Med Eng Phys     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-02-09     Completed Date:  2009-04-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422753     Medline TA:  Med Eng Phys     Country:  England    
Other Details:
Languages:  eng     Pagination:  234-43     Citation Subset:  IM    
Affiliation:
Bioengineering Department, Politecnico di Milano, Milan, Italy. monica.soncini@polimi.it
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MeSH Terms
Descriptor/Qualifier:
Aortic Aneurysm / surgery*
Aortic Valve / surgery*
Finite Element Analysis
Heart Valve Prosthesis
Humans
Models, Cardiovascular*
Sinus of Valsalva / surgery*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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