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B10
Improved Bioprosthetic Heart Valve Design: A 3D Computational Model To Assess the Effect of Geometrical Parameters on Structural Deterioration

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Improved Bioprosthetic Heart Valve Design: A 3D Computational Model To Assess the Effect of Geometrical Parameters on Structural Deterioration

Introduction

Prosthetic Heart Valves

Mechanical Aortic valves
Thrombosis
Anticoagulation (fatal side effects)

Bioprosthetic Aortic Valves
No anticoagulation
A too short lifetime

The Goal
Improvement of BAVs design
Less Structural Valve Deterioration (SVD)
Lower Pressure Drop

 

Results

Pressure Drop was Altered by Design Parameters
Stresses were Altered by Design Parameters

Leaflet Twisting due to Parabolic Curvature
SVD and Locations of Maximum Stress

Discussion

A linear radial curvature, circular circumferential curvature, and/or a lower leaflet angle leads to lower pressure drop

A parabolic circumferential, a non-linear radial curvature, and/or a larger leaflet angle could lead to:

Higher stresses when the valve is open
Lower stresses when the valve is closed

A valve design with a lower pressure drop might have higher chances of SVD

 

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