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Surgical treatment of pulmonary atresia with intact ventricular septum
Insights
Surgical interventions for pulmonary atresia with intact ventricular septum showed limited success historically. A modern approach combining Potts anastomosis and pulmonary valvotomy offers improved outcomes for infants with small right ventricles.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Surgery
- Cardiovascular Surgery
Background:
- Pulmonary atresia with intact ventricular septum (PA/IVS) is a complex congenital heart defect.
- Historically, surgical outcomes for PA/IVS have been challenging, with high mortality rates.
- Early surgical strategies often involved pulmonary valvotomy or systemic-pulmonary shunts.
Purpose of the Study:
- To review surgical treatments for pulmonary atresia with intact ventricular septum.
- To evaluate the effectiveness of historical and recent surgical approaches.
- To assess the potential of a combined Potts anastomosis and pulmonary valvotomy strategy.
Main Methods:
- Retrospective review of 59 children with PA/IVS treated between 1950 and mid-1975.
- Analysis of outcomes based on surgical procedures: pulmonary valvotomy, systemic-pulmonary shunts (Waterston anastomosis), and atrial septectomy.
- Evaluation of a recent cohort treated with balloon atrial septostomy, Potts anastomosis, and pulmonary valvotomy.
Main Results:
- Early surgical treatments (valvotomy, shunts) had high mortality; only 2 long-term survivors from Waterston anastomosis.
- The recent strategy (Potts anastomosis, pulmonary valvotomy) in 23 infants resulted in 4 early and 2 late deaths.
- Of 17 survivors from the recent strategy, 4 required further shunts, and one underwent formal repair.
Conclusions:
- Historical surgical methods for PA/IVS had limited long-term success.
- The combined Potts anastomosis and pulmonary valvotomy approach in infants with small right ventricles demonstrates a lower initial mortality.
- This strategy offers potential for right ventricular growth and subsequent complete repair.
Abstract:
Fifty-nine children with pulmonary atresia and intact ventricular septum underwent various forms of surgical treatment at the Hospital for Sick Children, Toronto, during 1950 to mid 1975. Twenty-three patients had pulmonary valvotomy, 15 direct, 2 indirect, and 6 both direct valvotomy and infundibulectomy. All died, 19 early and 4 late. Of 13 patients who received a systemic-pulmonary artery shunt, 4 combined with surgical atrial septectomy, there are only 2 long-term survivors both of whom were children who had had a Waterston anastomosis. Recently we have been treating infants with small right ventricles with balloon atrial septostomy at cardiac catherterization followed by a Potts anastomosis and pulmonary valvotomy. If the Potts anastomosis appears satisfactory the persistent ductus arteriosus is ligated. This scheme was used in 23 infants, with 4 early deaths and 2 late deaths. Of 17 survivors, further shunts were required in 4 children. One child has had a formal repair, with insertion of valves in both tricuspid and pulmonary areas. We believe that this operative combination of Potts anastomosis and pulmonary valvotomy offers the infant with pulmonary atresia and a small right ventricle a relatively low initial mortality and the possibility of right ventricular enlargement and subsequent repair.