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Hemodynamic evaluation of Hancock and Carpentier-Edwards bioprostheses
Insights
The Carpentier-Edwards porcine bioprosthesis demonstrates superior hemodynamic performance with significantly lower transvalvular gradients compared to the Hancock porcine xenograft in both aortic and mitral valve replacements. This finding is crucial for optimizing patient outcomes with bioprosthetic valves.
Area of Science:
- Cardiovascular Surgery
- Biomedical Engineering
- Medical Devices
Background:
- Hancock (H) and Carpentier-Edwards (CE) porcine xenografts are widely used bioprostheses for aortic and mitral valve replacement.
- Assessing the hemodynamic performance of these valves is critical for clinical decision-making and patient outcomes.
Purpose of the Study:
- To compare the intraoperative hemodynamic performance of Hancock and Carpentier-Edwards porcine bioprostheses.
- To evaluate transvalvular gradients and cardiac outputs across different valve sizes in aortic and mitral positions.
Main Methods:
- Intraoperative measurement of transvalvular gradients and cardiac outputs.
- Study included 122 patients undergoing aortic or mitral valve replacement.
- Data analyzed for various valve sizes (23-mm to 33/35-mm).
Main Results:
- Carpentier-Edwards valves showed significantly lower peak aortic valve gradients than Hancock valves at comparable cardiac outputs (p < 0.01).
- Mitral valve gradients were also significantly lower for Carpentier-Edwards compared to Hancock prostheses (p < 0.05).
- Specific gradient values detailed for each valve type and size in both aortic and mitral positions.
Conclusions:
- Carpentier-Edwards porcine bioprostheses exhibit superior hemodynamic performance, characterized by lower transvalvular gradients, compared to Hancock porcine xenografts.
- These findings suggest potential benefits of CE valves in reducing hemodynamic stress on patients.
- The study underscores the importance of bioprosthesis selection based on hemodynamic efficiency.
Abstract:
The Hancock (H) and Carpentier-Edwards (CE) porcine xenografts are the most commonly used bioprostheses hemodynamic performance of these valves at each valve size was assessed by intraoperative measurement of transvalvular gradients and cardiac outputs in 122 patients undergoing aortic or mitral valve replacement. At comparable cardiac outputs, peak aortic valve gradients (+/- DS) were: 23-mm valve - H (modified orifice) 10.8 +/- 5.9 mm Hg, CE 7.6 +/- 6.2 mm Hg; 25-mm valve - H 11.9 +/- 5.5 mm Hg, CE 8.3 +/- 5.9 mm Hg; 27/29-mm valve - H 11.0 +/- 6.0 mm Hg, CE 6.6 +/- 5.0 mm Hg. Mitral valve gradients were: 29-mm valve - H 3.7 +/- 1.2 mm Hg, CE 2.8 +/- 1.1 mm Hg; 31-mm valve - H 3.5 +/- 1.0 mm Hg, CE 2.6 +/- 0.7 mm Hg, 33/35-mm valve - H 3.2 +/- 1.9 mm Hg. In both the mitral and aortic positions, Carpentier-Edwards porcine bioprostheses had significantly lower (p less than 0.01 and P less than 0.05, respectively) transvalvular gradients than Hancock porcine xenografts.