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Biaxial Mechanical Characterizations of Atrioventricular Heart Valves
Published on: April 9, 2019
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Geometric characteristics of bicuspid aortic valves
Jan Nijs1,2, Babs Vangelder3, Kaoru Tanaka2,4
1Cardiac Surgery Division, Department of Cardiac Surgery, University Hospital Brussels, Brussels, Belgium.
JTCVS Techniques
|January 3, 2022
Summary
Coaptation angles in bicuspid aortic valves vary based on raphe length and commissure position. Angle α correlates with raphe length, while angle β depends on commissure placement, impacting sinus size.
Area of Science:
- Cardiovascular Imaging and Morphology
- Cardiac Surgery and Valve Disease
Background:
- Bicuspid aortic valve (BAV) is a common congenital heart defect.
- Understanding BAV geometry is crucial for surgical planning and outcomes.
- Coaptation angles are key geometric parameters of aortic valve function.
Purpose of the Study:
- To investigate coaptation angles (α and β) in bicuspid aortic valve geometry.
- To determine the correlation between these angles and other geometric features like raphe length and sinus surfaces.
- To analyze the variability and determinants of these angles in BAV patients.
Main Methods:
- Computed tomography (CT) scans from 45 patients with BAV were analyzed.
- Calculation of coaptation angles α and β, other angles (γ, ε), raphe length, and sinus surfaces.
- Spearman correlation was used to assess associations among all measured parameters.
Main Results:
- Coaptation angles α and β showed significant differences (P < .001).
- Angle α significantly correlated with raphe length (P = .008), while β depended on commissure position.
- The noncoronary sinus was largest, primarily determined by angle β in right/left fusion patterns.
Conclusions:
- Coaptation angle α is influenced by raphe length; angle β is determined by commissure position.
- Raphe and commissure positions (especially right/non) are variable in BAV.
- Angle ε₂ was the most constant angle, though geometrically dependent on β.
Keywords:
BAV, bicuspid aortic valveCT, computed tomographyNCS, noncoronary sinusaortaaortic valveaortic valve repairbicuspidMore Related Videos
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