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Modeling of myocardial splitting due to deep penetration
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
2010 (English)In: CONSTITUTIVE MODELS FOR RUBBER VI, BOCA RATON: CRC PRESS-TAYLOR & FRANCIS GROUP , 2010, 449-452 p.Conference paper (Refereed)
Abstract [en]

The risk for pacemaker lead perforation, a rare but serious clinical complication, is thought to be minimized by perforation resistant device design. Fracture properties of ventricular tissue play a central role in such optimization studies, however, this information is currently not provided by the open literature; even failure models for soft biological tissue in general are rare. Incompressible finite deformations, material nonlinearity and time-dependent anisotropic properties require sophisticated approaches to identify and model failure of such a material. In this study we investigated myocardial failure due to deep penetration, where previously collected data from in-vitro experiments are integrated in a non-linear Finite Element model. In details, the proposed model describes tissue splitting by a cohesive process zone, and hence, tissue failure is modeled as a gradual process, where all inelastic phenomena are accumulated and mathematically captured by a traction separation law. The cohesive zone is embedded in a fibrous bulk material thought to capture the properties of passive myocardial tissue, where a transversely isotropic hyper-elastic constitutive description proposed in the literature was utilized. The developed numerical model integrates latest experimental data and is able to replicate quantitative and qualitative data from ventricular penetration experiments.

Place, publisher, year, edition, pages
URN: urn:nbn:se:kth:diva-34244ISI: 000290418100073ISBN: 978-0-415-56327-7OAI: diva2:422599
6th European Conference on Constitutive models for Rubber Dresden, GERMANY, SEP 07-10, 2009
QC 20110613Available from: 2011-06-13 Created: 2011-05-30 Last updated: 2011-06-13Bibliographically approved

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Forsell, CarolineGasser, T. Christian
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