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[Follow-up of patients treated by conduits between the right ventricle and the pulmonary artery]
S Chraibi1, M Beghetti, A Kalangos
1Hôpital des Enfants, Département de pédiatrie, Genève, Suisse.
Insights
This study analyzed 77 right ventricle-pulmonary artery conduits in pediatric patients, finding a 15-year survival rate of 65.3% and a 40.7% reoperation rate, with stenosis being the primary cause for conduit replacement.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Biomaterials in Medicine
Context:
- Right ventricle-to-pulmonary artery (RV-PA) conduit reconstruction is crucial for complex congenital heart defects.
- This study retrospectively analyzes outcomes of RV-PA conduits implanted between 1981 and 1998.
- Patient cohort included various diagnoses such as Tetralogy of Fallot and Transposition of the Great Arteries.
Purpose:
- To evaluate the long-term efficacy and durability of different types of RV-PA conduits.
- To determine survival rates and the need for reoperation in pediatric patients receiving RV-PA conduits.
- To identify the primary reasons for conduit failure and replacement.
Summary:
- A total of 77 RV-PA conduits (homografts, Dacron, polystans) were implanted in 67 pediatric patients.
- The 5, 10, and 15-year survival rates were 78.4%, 65.3%, and 65.3%, respectively.
- Conduit replacement was necessary in 15% of cases, primarily due to stenosis, with 15-year non-replacement rates at 40.7%.
Impact:
- The findings provide valuable long-term data on RV-PA conduit performance in pediatric congenital heart surgery.
- Results suggest homografts may offer slightly longer durability than valved Dacron conduits, though not statistically significant.
- This research aids in understanding conduit longevity and informs future surgical strategies and material selection for RV-PA reconstruction.
Abstract:
Between 1981 and 1998, 77 right ventricle-pulmonary artery conduits were implanted in 67 patients (37 boys, 30 girls, average age 6.3 years; range: 3 months to 17 years). The diagnoses were transposition of the great arteries with ventricular septal defect and obstruction of the pulmonary outflow tract (N = 22), tetralogy of Fallot (N = 16), truncus arteriosus (N = 9), double outlet right ventricle with pulmonary stenosis or atresia (N = 8) and agenesis of the pulmonary valve with pulmonary stenosis (N = 2). The implanted conduits were homografts in 50 cases (43 aortic and 7 pulmonary), 11 valved Dacron grafts, 4 valved polystans grafts and 2 non-valved conduits. The average follow-up period was 3.6 years (range: 1 month to 17 years). Early death was observed in 8 patients (12%) and late death in 6 patients (9%). The 5, 10 and 15 year survival rates were 78.4%, 65.3%, and 65.3%, respectively. The conduits had to be replaced in 10 patients (15%). The non-replacement rate of all conduits at 5, 10 and 15 years was 81.4%; 40.7% and 40.7%, respectively. The causes of replacement were pure stenosis (54.5%), pure regurgitation (9%) and mixed stenosis and regurgitation (27.2%). These results are comparable to other published series showing a 15 year survival rate of 65% and a 59% reoperation rate at 15 years. Homografts have a slightly longer life compared with valved Dacron conduits but the difference is not statistically significant.