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Early and late results in pulmonary atresia
Insights
Surgical outcomes for infants with pulmonary atresia and intact ventricular septum depend on right ventricular conus patency. A patent conus allows successful pulmonary valvotomy, while a non-patent conus requires a shunt and outflow tract reconstruction for favorable long-term results.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Surgery
- Thoracic Surgery
Background:
- Pulmonary atresia with intact ventricular septum is a complex congenital heart defect.
- Surgical management aims to establish pulmonary blood flow and promote right ventricular development.
- Predicting surgical success is crucial for optimizing outcomes in affected infants.
Purpose of the Study:
- To review early and long-term surgical results in infants with pulmonary atresia and intact ventricular septum.
- To identify predictors of surgical success and guide treatment strategies.
- To evaluate the impact of right ventricular conus patency on surgical outcomes.
Main Methods:
- Retrospective review of 24 infants undergoing surgical treatment for pulmonary atresia with intact ventricular septum.
- Analysis of preoperative right ventricular angiograms to assess conus patency.
- Correlation of surgical procedures (pulmonary valvotomy, systemic-pulmonary shunt) with patient outcomes.
Main Results:
- Pulmonary valvotomy was effective in infants with a patent right ventricular conus up to the atretic valve.
- Infants lacking a patent conus did not survive pulmonary valvotomy.
- A staged approach (shunt followed by outflow tract reconstruction) in 8 infants with non-patent conus led to excellent long-term results, including ventricular growth and normal pressures.
Conclusions:
- Right ventricular conus patency is a critical determinant of success for pulmonary valvotomy in pulmonary atresia with intact ventricular septum.
- A systemic-pulmonary shunt followed by right ventricular outflow tract reconstruction is recommended for infants with a non-patent conus.
- Successful reconstruction allows for right ventricular growth and excellent long-term outcomes, with normal pressures and angiographic appearance.
Abstract:
The early and long-term results following surgical treatment of 24 infants with pulmonary atresia with an intact ventricular septum were reviewed. Pulmonary valvotomy was the operation most often performed, and we came to realize that this was effective when the preoperative right ventricular angiogram had shown an open conus up to the atretic valve. By contrast, no infant without a patent conus survived pulmonary valvotomy. We suggest that this subgroup of patients (8 of the 24 in this series) should have a systemic-pulmonary shunt followed later by reconstruction of the right ventricular outflow tract. Diminutive right ventricles will grow and dilate if a reasonable passageway is formed from right ventricle to pulmonary artery. Thus the long-term results have been excellent when this has been carried out, with normal right ventricular pressures and appearance on angiography in 7 patients followed up to 13 years.