Geometric modeling of functional trileaflet aortic valves: development and clinical applications

Area of Science:

• Cardiovascular Biology
• Biomedical Engineering
• Medical Device Design

Background:

• Aortic valve function is critical for preventing retrograde blood flow.
• Existing models for optimal trileaflet valve performance lack methods for suboptimal yet functional variations.
• Understanding dimensional variability is key for assessing valve health and designing replacements.

Purpose of the Study:

• To develop a method for quantifying dimensional variations in aortic valve components.
• To establish criteria for functional aortic valve geometry.
• To provide tools for evaluating the impact of dimensional changes on valve performance.

Main Methods:

• Analysis of dimensional variability in silicone rubber casts of human aortic valves.
• Development of analytical equations for a 3D geometric model of trileaflet valves (open and closed states).
• Creation of analytical, numerical, and graphical tools to explore dimensional ranges.

Main Results:

• Established a comprehensive set of geometric guidelines for safe aortic valve operation during the cardiac cycle.
• Developed a model to rapidly assess the functionality of valves based on component dimensions.
• Identified practical safety margins for dimensional variations.

Conclusions:

• The presented geometry-based model enables quick determination of valve functionality from component dimensions.
• This approach is valuable for prosthetic heart valve design and for surgeons performing valve-sparing procedures.
• Provides a framework for understanding the functional consequences of aortic valve dimensional variability.