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Late results of right ventricular outflow tract reconstruction with Björk-Shiley valved conduits
Insights
Mechanical valves in pediatric congenital heart defect surgery led to high mortality and reoperations. Björk-Shiley valves for right ventricular outflow tract reconstruction are not recommended due to poor long-term outcomes.
Area of Science:
- Pediatric Cardiology
- Cardiovascular Surgery
- Biomedical Engineering
Background:
- Congenital heart disease (CHD) necessitates surgical interventions.
- Right ventricular outflow tract (RVOT) reconstruction is a common procedure in CHD.
- The use of mechanical valves in pediatric RVOT conduits has been explored.
Purpose of the Study:
- To evaluate the long-term outcomes of RVOT reconstruction using Björk-Shiley mechanical valves in children with CHD.
- To identify risk factors associated with mortality and reoperation in this patient cohort.
- To provide recommendations regarding the use of mechanical valves in pediatric RVOT conduits.
Main Methods:
- Retrospective analysis of 27 children undergoing RVOT reconstruction with Björk-Shiley valves between 1971 and 1976.
- Conditions included pulmonary atresia with VSD, truncus arteriosus, and complex CHD.
- Data collection included operative age, diagnoses, mortality, and reoperation rates.
Main Results:
- High overall mortality (52%) with nine early and five late deaths.
- Actuarial survival was 55% at 4 years, 35% at 8 years, and 28% at 12 years.
- Ten patients required reoperation due to conduit stenosis and valve obstruction; subsequent biological valves were used.
Conclusions:
- Björk-Shiley mechanical valves are associated with high mortality and reoperation rates in pediatric RVOT reconstruction.
- Mortality risk is elevated in infants, and patients with truncus arteriosus, pulmonary hypertension, or complex CHD.
- Mechanical valves should be avoided in RVOT conduit reconstruction for congenital heart disease.
Abstract:
Between 1971 and December 1976, 27 children with congenital heart disease underwent right ventricular outflow tract reconstruction with conduits incorporating a Björk-Shiley valve. The conditions corrected were pulmonary atresia with ventricular septal defect (14 patients), truncus arteriosus (6 patients), and complex disease (7 patients). At operation the children were aged from 12 days to 16 years (five patients were less than one year old). Overall mortality for the group was high (52%). There were nine early deaths and five late ones. Actuarial survival till death or reoperation was 55% at four years, 35% at eight years, and 28% at 12 years. Ten children subsequently underwent reoperation for conduit stenosis caused by neointimal proliferation and valve obstruction. The new conduits incorporated a biological valve. Mortality was highest in patients aged less than one year, and in those with truncus arteriosus, severe pulmonary hypertension, or complex heart disease. Mechanical valves should be avoided in conduit reconstruction of the right ventricular outflow tract for congenital heart disease.