A geometrically adaptable heart valve replacement

Area of Science:

• Biomaterials Science
• Cardiovascular Engineering
• Pediatric Cardiology

Background:

• Congenital heart valve disease necessitates early valve replacement.
• Current prosthetic valves do not accommodate somatic growth, leading to repeat surgeries in pediatric patients.
• A growth-accommodating prosthetic valve is crucial for improving long-term outcomes.

Purpose of the Study:

• To develop and validate a biomimetic prosthetic valve capable of geometric adaptation to somatic growth.
• To address the limitations of existing prosthetic valves in pediatric patients.
• To offer a paradigm shift in treating congenital heart valve disease.

Main Methods:

• Design of a balloon-expandable synthetic bileaflet valve analog inspired by human venous valves.
• Benchtop testing to validate geometric adaptability and functionality.
• In vivo survival studies in growing sheep to assess growth accommodation.

Main Results:

• The biomimetic valve demonstrated geometric adaptability to dimensional and shape changes.
• Benchtop and acute in vivo experiments confirmed design functionality.
• In vivo studies in growing sheep showed successful accommodation of somatic growth through mechanical valve expansion.

Conclusions:

• The developed prosthetic valve offers dynamic size adaptability, preserving unidirectional flow.
• This biomimetic design represents a significant advancement in addressing the challenges of congenital heart valve disease in growing children.
• The findings suggest a potential paradigm shift towards more sustainable prosthetic valve solutions.