IN VITRO COMPARISON BETWEEN THE HYDRODYNAMIC CHARACTERISTICS OF THE HANCOCK 250 (MODIFIED ORIFICE) XENOGRAFTS AND THE BJÖRK-SHILEY AORTIC VALVE PROSTHESES

ASAIO Journal ◽  
1977 ◽  
Vol 23 (1) ◽  
pp. 89-93 ◽  
Author(s):  
J. T. M. Wright
Keyword(s):  
Aortic Valve ◽  
Hydrodynamic Characteristics ◽  
Valve Prostheses ◽  
In Vitro Comparison

scholarly journals In vitro comparison of aortic valve movement after valve-preserving aortic replacement

2006 ◽  
Vol 132 (1) ◽  
pp. 32-37 ◽  
Author(s):  
Roland Fries ◽  
Thomas Graeter ◽  
Diana Aicher ◽  
Helmut Reul ◽  
Christoph Schmitz ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Valve Movement ◽  
Aortic Replacement ◽  
In Vitro Comparison

scholarly journals Fluid-structure interaction of heart valve dynamics in comparison to finite-element analysis

2018 ◽  
Vol 4 (1) ◽  
pp. 259-262 ◽  
Author(s):  
Finja Borowski ◽  
Michael Sämann ◽  
Sylvia Pfensig ◽  
Carolin Wüstenhagen ◽  
Robert Ott ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Heart Valve ◽  
Elastic Behavior ◽  
Valve Prosthesis ◽  
Arbitrary Lagrangian Eulerian ◽  
Element Analysis ◽  
Valve Dynamics ◽  
Valve Opening ◽  
Valve Prostheses

AbstractAn established therapy for aortic valve stenosis and insufficiency is the transcatheter aortic valve replacement. By means of numerical simulation the valve dynamics can be investigated to improve the valve prostheses performance. This study examines the influence of the hemodynamic properties on the valve dynamics utilizing fluidstructure interaction (FSI) compared with results of finiteelement analysis (FEA). FEA and FSI were conducted using a previously published aortic valve model combined with a new developed model of the aortic root. Boundary conditions for a physiological pressurization were based on measurements of ventricular and aortic pressure from in vitro hydrodynamic studies of a commercially available heart valve prosthesis using a pulse duplicator system. A linear elastic behavior was assumed for leaflet material properties and blood was specified as a homogeneous, Newtonian incompressible fluid. The type of fluid domain discretization can be described with an arbitrary Lagrangian-Eulerian formulation. Comparison of significant points of time and the leaflet opening area were used to investigate the valve opening behavior of both analyses. Numerical results show that total valve opening modelled by FEA is faster compared to FSI by a factor of 5. In conclusion the inertia of the fluid, which surrounds the valve leaflets, has an important influence on leaflet deformation. Therefore, fluid dynamics should not be neglected in numerical analysis of heart valve prostheses.

scholarly journals In vitro comparison of aortic heart valve prostheses

1988 ◽  
Vol 96 (6) ◽  
pp. 952-961 ◽  
Author(s):  
Erwin Knott ◽  
Helmut Reul ◽  
Martin Knoch ◽  
Ulrich Steinseifer ◽  
Günter Rau
Keyword(s):  
Heart Valve ◽  
Heart Valve Prostheses ◽  
Aortic Heart Valve ◽  
Valve Prostheses ◽  
In Vitro Comparison

scholarly journals In vitro comparison of bileaflet aortic heart valve prostheses

1993 ◽  
Vol 106 (3) ◽  
pp. 412-420 ◽  
Author(s):  
Helmut Reul ◽  
Jacques A.M. van Son ◽  
Ulrich Steinseifer ◽  
Bernhard Schmitz ◽  
Anselm Schmidt ◽  
...  
Keyword(s):  
Heart Valve ◽  
Heart Valve Prostheses ◽  
Aortic Heart Valve ◽  
Valve Prostheses ◽  
In Vitro Comparison

scholarly journals In vitro evaluation of flow patterns and turbulent kinetic energy in trans-catheter aortic valve prostheses

2015 ◽  
Vol 17 (S1) ◽  
Author(s):  
Daniel Giese ◽  
Bettina Baessler ◽  
Navid Madershahian ◽  
Yeong-Hoon Choi ◽  
David Maintz ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Kinetic Energy ◽  
Turbulent Kinetic Energy ◽  
Flow Patterns ◽  
In Vitro Evaluation ◽  
In Trans ◽  
Valve Prostheses

In-vitro wall shear measurements at aortic valve prostheses

1984 ◽  
Vol 17 (4) ◽  
pp. 263-279 ◽  
Author(s):  
W. Tillmann ◽  
H. Reul ◽  
M. Herold ◽  
K.-H. Bruss ◽  
J. van Gilse
Keyword(s):  
Aortic Valve ◽  
Wall Shear ◽  
Valve Prostheses

In vitro evaluation of flow patterns and turbulent kinetic energy in trans-catheter aortic valve prostheses

2017 ◽  
Vol 31 (1) ◽  
pp. 165-172 ◽  
Author(s):  
Daniel Giese ◽  
Kilian Weiss ◽  
Bettina Baeßler ◽  
Navid Madershahian ◽  
Yeong-Hoon Choi ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Kinetic Energy ◽  
Turbulent Kinetic Energy ◽  
Flow Patterns ◽  
In Vitro Evaluation ◽  
In Trans ◽  
Valve Prostheses

Assessment of the Effects of Deformation of the Fibrous Ring of the Aortic Valve on the Hydrodynamic Characteristics of Transcatheter Prostheses In Vitro

2019 ◽  
Vol 53 (4) ◽  
pp. 275-279
Author(s):  
A. A. Boykov ◽  
A. R. Tarkova ◽  
E. I. Kretov ◽  
A. A. Prokhorikhin ◽  
D. U. Malaev
Keyword(s):  
Aortic Valve ◽  
Hydrodynamic Characteristics
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