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The surgical management of total atrioventricular canal lesions
Insights
Early surgical repair of total atrioventricular canal (TAC) defects in infants is associated with lower mortality compared to palliative pulmonary artery banding followed by later repair. This study reviews outcomes for children undergoing TAC repair.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Disease Surgery
- Thoracic Surgery
Background:
- Total atrioventricular canal (TAC) defects are complex congenital heart conditions requiring surgical intervention.
- Management strategies have evolved, with palliative banding and complete repair being primary options.
- Outcomes data are crucial for guiding optimal surgical approaches in infants.
Purpose of the Study:
- To evaluate the surgical outcomes for children with total atrioventricular canal lesions.
- To compare the mortality rates between palliative pulmonary artery banding and complete primary repair.
- To provide evidence supporting early primary repair over staged surgical approaches.
Main Methods:
- Retrospective review of 16 pediatric patients undergoing surgery for TAC between 1969 and 1976.
- Analysis of outcomes including hospital mortality, late mortality, and reoperations.
- Comparison of results between infants who underwent initial pulmonary artery banding versus those who had complete primary repair.
Main Results:
- Twelve infants underwent palliative pulmonary artery banding with a 17% hospital mortality and one late death.
- Nine patients underwent complete repair, with a 33% hospital mortality and one late death.
- Mortality was exclusively observed in the group that initially received pulmonary artery banding.
Conclusions:
- Early primary repair of total atrioventricular canal defects appears to offer superior survival rates compared to palliative banding followed by later repair.
- Staged surgical approaches involving pulmonary artery banding carry a higher mortality risk.
- The findings support the consideration of early primary repair for total atrioventricular canal lesions in infants.
Abstract:
Between 1969 and 1976 sixteen children have had surgery for total atrioventricular canal lesions at the Royal Children's Hospital, Melbourne. Twelve infants had palliative banding of the main pulmonary artery to control heart failure and prevent the development of pulmonary hypertension, with two hospital deaths (17%) and one late death. One other patient has been lost to follow-up and may also have died. Nine patients have undergone complete repair, with three hospital deaths (33%), and one later death at reoperation for residual mitral incompetence. Five of these had previously had banding of the main pulmonary artery, and the mortality has occurred exclusively in this group. The techniques of repair are discussed, and reasons advanced in favour of early primary repair of the defect in preference to palliative banding and later secondary repair.