A theree-dimensional fibre-based model adapted fpr a computational biomechanical simulation of the helical ventricular myocardial band
- Autores: Jordi Marcé Nogué
- Directores de la Tesis: Francesc Roure Fernández (dir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2009
- Idioma: español
- Tribunal Calificador de la Tesis: Pere Caminal Magrans (presid.), Frederic Marimón Carvajal (secret.), Manel Ballester Rodes (voc.), Francesc Carreras Costa (voc.), Xavier Mora Giné (voc.)
- Materias:
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- Resumen
Contributing to the study of the Helical Ventricular Myocardial Band (HVMB), a computational biomechanical model using the Finite Element Model and mainly based in the fibres is developed. The model is adapted to the geometrical and topological characteristics of the band and the behaviour properties of the myocardial tissue and fibres. Also it's capable to solve the dynamic problem along the time of the heart cycle.
Firstly, a computational model to simulate the behaviour of the myocardial tissue, mainly based in the fibre, is presented. The main mesh of the model is a one-dimensional bundle of fibres, projected in the three-dimensional space, and surrounded by isoparametric 8-node continuum finite elements. The fibre element describes the active part of the muscle in which the contraction of it is activated by an internal electrical stimulus (action potential) and the continuum elements describe the connective tissue of the muscle that keep together the fibres. The action potential can be propagated along the muscle and following it in the same path and direction, the contraction of the muscle is also propagated.
Secondly, a geometrical model of the HVMB is created to apply the computational model in it. This model is a simplification of the band and the approximation is done starting from medical images of Magnetic Resonances from a real heart and from a silicon model of the HVMB. It's generated and meshed with a structured mesh using mathematical algorithms.
Finally, the computational model is solved applying the respective boundary conditions and the different effects that generate the deformation of the model: propagation of the action potential and blood pressure inside the ventricular cavities. The results obtained of the propagation of the action potential along the band, the deformation of the ventricular cavities and the ventricular dynamics during the cardiac cycle are compared with the results found in the Literature and in research reports to verify the model in a qualitative way.
