Related Experiment Video
Updated: Jun 30, 2026
14:14
Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement
Published on: December 11, 2017
Function of Contegra valved grafts after unifocalization
C Arenz1, N Sinzobahamvya, M Kaestner
1Pediatric Thoracic and Cardiovascular Surgery, Deutsches Kinderherzzentrum Sankt Augustin, Sankt Augustin, Germany.
The Thoracic and Cardiovascular Surgeon
|September 24, 2008
Summary
Contegra grafts effectively managed high pressures after major aortopulmonary collateral artery (MAPCA) unifocalization in infants. These grafts showed no significant dysfunction or need for reoperation at mid-term follow-up.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Biomaterials Science
Background:
- Assessing the durability of Contegra grafts under high-pressure conditions is crucial for pediatric cardiac surgery.
- Major aortopulmonary collateral arteries (MAPCAs) often require complex surgical repair in infants.
Purpose of the Study:
- To evaluate the functional performance and durability of Contegra grafts used in the surgical repair of MAPCAs.
- To determine if Contegra grafts can withstand the high-pressure environment post-unifocalization.
Main Methods:
- Retrospective review of 10 pediatric patients who underwent unifocalization of MAPCAs with Contegra grafts.
- Analysis of echocardiography and heart catheterization data, including pressure measurements and graft function.
- Median follow-up of 31 months for survivors.
Main Results:
- Contegra grafts demonstrated resilience in high-pressure conditions (RV/LV pressure ratio >75% in 9 patients).
- No graft obstruction or need for reoperation due to conduit dysfunction/failure was observed (100% freedom at 42 months).
- Minor graft valve regurgitation (Grade 2) occurred in some patients, but did not necessitate surgical intervention.
Conclusions:
- Contegra grafts are a suitable mid-term alternative to aortic homografts for MAPCA unifocalization in infants.
- The grafts maintained structural integrity and function despite significant postoperative pressures.
- Further long-term studies are warranted to confirm sustained efficacy.
