1.
J Biomech
; 22(6-7): 597-607, 1989.
Artigo
em Inglês
| MEDLINE
| ID: mdl-2808443
RESUMO
The velocity fields downstream of four prosthetic heart valves were mapped in vitro over the entire cross-section of a model aortic root using laser Doppler anemometry. THe Björk-Shiley 60 degrees convexo-concave tilting disc valve, the Smeloff-Cutter caged ball valve, the St. Jude Medical bileaflet valve, and the Ionescu-Shiley standard bioprosthesis were examined under both steady and pulsatile flows. Velocity profiles under steady flow conditions were a good approximation for pulsatile profiles only during midsystole. The pulsatile flow characteristics of the four valves showed variation in large scale flow structures. Comparison of the valves according to pressure drop, shear stress and maximum velocities are also provided.
Assuntos
Valva Aórtica , Próteses Valvulares Cardíacas , Modelos Cardiovasculares , Bioprótese , Velocidade do Fluxo Sanguíneo , Pressão Sanguínea , Humanos , Desenho de Prótese , Fluxo Sanguíneo Regional , Reologia , Estresse Mecânico
2.
Eng Med
; 17(4): 181-7, 1988 Oct.
Artigo
em Inglês
| MEDLINE
| ID: mdl-3224737
3.
Med Biol Eng Comput
; 25(6): 645-9, 1987 Nov.
Artigo
em Inglês
| MEDLINE
| ID: mdl-3505303
4.
Med Biol Eng Comput
; 24(5): 449-59, 1986 Sep.
Artigo
em Inglês
| MEDLINE
| ID: mdl-3821200