Collagen fibers reduce stresses and stabilize motion of aortic valve leaflets during systole.
J Biomech
; 37(3): 303-11, 2004 Mar.
Article
en En
| MEDLINE
| ID: mdl-14757449
ABSTRACT
The effect of collagen fibers on the mechanics and hemodynamics of a trileaflet aortic valve contained in a rigid aortic root is investigated in a numerical analysis of the systolic phase. Collagen fibers are known to reduce stresses in the leaflets during diastole, but their role during systole has not been investigated in detail yet. It is demonstrated that also during systole these fibers substantially reduce stresses in the leaflets and provide smoother opening and closing. Compared to isotropic leaflets, collagen reinforcement reduces the fluttering motion of the leaflets. Due to the exponential stress-strain behavior of collagen, the fibers have little influence on the initial phase of the valve opening, which occurs at low strains, and therefore have little impact on the transvalvular pressure drop.
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Base de datos:
MEDLINE
Asunto principal:
Válvula Aórtica
/
Sístole
/
Presión Sanguínea
/
Colágeno
/
Modelos Cardiovasculares
/
Movimiento
Idioma:
En
Revista:
J Biomech
Año:
2004
Tipo del documento:
Article