Porcine valve durability in children

Area of Science:

• Cardiovascular Surgery
• Pediatric Cardiology
• Biomaterials Science

Background:

• Porcine heterograft valves are used in pediatric cardiac surgery.
• Calcification is a known issue, potentially more severe in younger patients.

Purpose of the Study:

• To evaluate the long-term durability of porcine valves in pediatric patients (<21 years).
• To assess factors influencing valve degeneration, including age and position.

Main Methods:

• Multicenter study of 227 pediatric patients with porcine valve implantation.
• Actuarial analysis of valve durability and degeneration over time.
• Comparison of degeneration rates based on patient age and valve position.

Main Results:

• 20 out of 227 porcine valves degenerated, primarily in aortic and mitral positions.
• At 5 years, functional rates were 40% for aortic, 40% for mitral, 100% for tricuspid, 100% for pulmonary valves, and 89% for pulmonary conduits.
• Calcification and dysfunction occurred significantly faster in younger children and in left-sided/systemic positions.

Conclusions:

• Porcine heterograft valves exhibit accelerated calcification and dysfunction in pediatric patients.
• Younger age and left-sided valve positions are associated with poorer long-term outcomes.
• These findings highlight the need for careful consideration of valve choice and monitoring in pediatric cardiac surgery.