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Aortic valve replacement with stentless porcine bioprostheses
T E David1, G C Ropchan, J W Butany
1Division of Cardiovascular Surgery, Toronto General Hospital, Ontario, Canada.
Journal of Cardiac Surgery
|December 1, 1988
Summary
Stentless porcine aortic valves offer superior hemodynamic results and durability compared to stented valves. Early clinical trials show satisfactory outcomes in patients receiving these advanced bioprostheses.
Area of Science:
- Cardiovascular Surgery
- Biomaterials Science
Background:
- Stented bioprosthetic valves can cause obstruction and reduced durability.
- Stentless valves aim to improve hemodynamics and longevity by eliminating stent-related issues.
Purpose of the Study:
- To evaluate the hemodynamic performance and durability of stentless porcine aortic bioprostheses.
- To assess the feasibility and safety of aortic valve replacement using stentless porcine valves.
Main Methods:
- Aortic valve replacement using stentless glutaraldehyde-fixed porcine bioprostheses in six young sheep.
- Hemodynamic evaluation at 3-6 months post-operation, including gradient and regurgitation assessment.
- Explantation and histological examination for healing and calcification.
Main Results:
- Sheep demonstrated no resting gradients or aortic regurgitation post-operation.
- Explanted valves showed excellent healing in the aortic root with no calcification.
- Initial clinical trial results in five human patients were satisfactory.
Conclusions:
- Stentless porcine aortic bioprostheses provide excellent hemodynamic function and durability.
- This valve type is a promising alternative for aortic valve replacement, with positive early clinical outcomes.