[Spherical configuration of the aortic valve]

Area of Science:

• Cardiovascular anatomy
• Biomechanical engineering

Context:

• Understanding the precise geometry of the aortic annulus is crucial for developing effective cardiac prosthetics.
• Previous models often oversimplified the complex, non-planar shape of the aortic valvular ring.

Purpose:

• To investigate the three-dimensional anatomical configuration of the normal human aortic valvular ring.
• To determine if this natural shape can be accurately replicated for artificial applications.

Summary:

• Silicone casts of six normal aortic valves revealed the aortic valvular ring originates from a spherical or hemispherical shape.
• Key dimensions (Db, Dc, h) and their ratios were quantified, providing a geometric blueprint.
• These findings enabled the artificial reproduction of the aortic valvular ring's specific configuration.

Impact:

• Provides a precise geometric model of the aortic valvular ring for improved bioprosthesis design.
• Facilitates the development of more anatomically accurate and potentially better-functioning artificial heart valves.
• Contributes to advancements in cardiovascular device engineering and surgical implantation techniques.