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Fifteen-year experience with surgical repair of truncus arteriosus
Insights
Surgical repair of truncus arteriosus in 167 patients showed a 28.7% mortality. Early repair and improved truncal valve management are crucial for better long-term survival in this complex congenital heart defect.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- Truncus arteriosus is a rare congenital heart defect requiring surgical intervention.
- Surgical repair outcomes have evolved over time, necessitating analysis of long-term results.
Purpose of the Study:
- To evaluate the hospital mortality and long-term survival rates after surgical repair of truncus arteriosus.
- To identify preoperative and postoperative factors influencing surgical outcomes and survival.
Main Methods:
- Retrospective analysis of 167 patients undergoing truncus arteriosus repair between 1965 and 1982.
- Correlation analysis of patient demographics, operative parameters, and pressure ratios with mortality and survival.
Main Results:
- Hospital mortality was 28.7%. Factors associated with increased mortality included young age at operation and specific post-repair pressure ratios.
- Late survival rates at 5 and 10 years were 84.4% and 68.8%, respectively.
- Preoperative factors like older age, truncal valve insufficiency, lower pulmonary/systemic flow ratio, and unilateral pulmonary artery absence correlated with reduced long-term survival.
Conclusions:
- Early surgical repair of truncus arteriosus is recommended.
- Improvements in managing truncal valve insufficiency and developing better extracardiac valved conduits are essential for enhancing long-term outcomes.
Abstract:
From 1965 until March, 1982, 167 patients underwent surgical repair of truncus arteriosus. The age at operation ranged from 18 days to 33 years (mean 6 years). There were 48 hospital deaths (28.7%). The following factors had a positive correlation with the possibility of a surgical death: age at operation less than 2 years (p less than 0.001), a postrepair pulmonary arterial/left ventricular pressure ratio greater than 0.5 for patients with two pulmonary arteries (p less than 0.001) and greater than 0.6 for patients with unilateral absence of a pulmonary artery (p less than 0.02), and a postrepair right ventricular/left ventricular pressure ratio greater than 0.8 (p less than 0.008). The 119 hospital survivors were followed up for a total of 829 person-years. Late survival rate at 5 years was 84.4% and at 10 years, 68.8%. Preoperative factors that correlated with a reduced long-term survival rate were as follows: increasing age at operation (p = 0.004), the presence of moderate or severe truncal valve insufficiency (p = 0.008), lower pulmonary/systemic flow ratio (p = 0.04), and unilateral absence of a pulmonary artery (p less than 0.001). Thirty-six patients required reoperation during the follow-up period (30%) primarily for replacement of the right ventricular-pulmonary arterial conduit and/or for truncal valve replacement. The long-term results obtained in these patients support the need for early repair of the anomaly, improvement in the methods for control or repair of the truncal valve insufficiency, and the continued search for better extracardiac valved conduits.