Aortic valve leaflet and root dimensions in normal tricuspid aortic valves: A computed tomography study

Area of Science:

• Cardiovascular Imaging
• Cardiac Anatomy
• Biomedical Engineering

Background:

• Normal tricuspid aortic valves are essential for proper heart function.
• Detailed geometric analysis of aortic valve leaflets is important for understanding valve function.
• Aortic valve asymmetry may impact its performance.

Purpose of the Study:

• To conduct a detailed geometric analysis of the aortic root and tricuspid aortic valve.
• To focus on the asymmetry of the three aortic valve leaflets.
• To assess the relationship between leaflet asymmetry and normal aortic valve function.

Main Methods:

• Retrospective analysis of coronary computed tomography angiograms.
• Manual aortic root segmentation and automated measurements of aortic root and leaflets.
• Calculation of absolute and relative differences in leaflet dimensions to assess asymmetry.

Main Results:

• All 70 analyzed normal tricuspid aortic valves showed some degree of asymmetry.
• 86% of valves were classified as asymmetric based on predefined criteria.
• Leaflet effective height demonstrated the least asymmetry, suggesting its critical role.

Conclusions:

• Some degree of asymmetry is a common finding in normal tricuspid aortic valves.
• Equal leaflet dimensions are not necessary for normal aortic valve function.
• Leaflet effective height is a key geometric parameter for maintaining aortic valve competence.