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Repair of complete atrioventricular canal in early childhood
Insights
Intracardiac repair of complete atrioventricular canal in children yielded positive growth outcomes. Surgical success depended on associated anomalies and atrioventricular valve tissue quality.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Surgery
- Cardiac Anatomy
Background:
- Complete atrioventricular canal (CAVC) is a complex congenital heart defect.
- Surgical repair of CAVC presents significant challenges, especially in young children.
- Rastelli classification helps categorize CAVC types (A and C) influencing surgical approach.
Purpose of the Study:
- To evaluate the outcomes of intracardiac repair for complete atrioventricular canal in pediatric patients.
- To identify factors influencing the success of CAVC repair.
- To assess the impact of surgical repair on growth and development.
Main Methods:
- Retrospective analysis of 10 consecutive pediatric patients undergoing CAVC repair between 1977 and 1981.
- Surgical repair involved cold cardioplegic cardiac arrest, deep hypothermia, and low-flow perfusion or circulatory arrest.
- Patients were classified by Rastelli type (A or C) and presence of associated cardiac anomalies.
Main Results:
- Two early postoperative deaths occurred due to renal failure; one late death from cardiac failure due to mitral incompetence.
- One patient required reoperation for mitral valve replacement due to persistent insufficiency.
- All surviving patients showed accelerated growth post-repair; outcomes were independent of age/weight but influenced by anomalies and valve tissue.
Conclusions:
- Intracardiac repair of CAVC can lead to significant growth acceleration in pediatric patients.
- Associated cardiac anomalies and the quality/quantity of atrioventricular valve tissue are critical factors affecting surgical outcomes.
- Despite challenges, surgical repair offers a very good outcome for CAVC patients.
Abstract:
From November 1977 to January 1981, 10 consecutive patients underwent intracardiac repair of the complete atrioventricular canal at our institution. Ages ranged from 14 months to 4.5 years (mean age 20 months). Four patients were predominantly of type A, while 6 were predominantly of type C according to Rastelli's classification. Three patients had associated cardiac anomalies (2 tetralogy of Fallot and one parachute mitral valve). Standard repair and correction of the associated anomalies were performed under cold cardioplegic cardiac arrest and deep hypothermia with low-flow perfusion or circulatory arrest. Two patients died early postoperatively in severe renal failure and one died 6.5 months postoperatively in cardiac failure due to progressive mitral valve incompetence. One patient, with parachute mitral valve, was reoperated and the mitral valve was replaced because of persistent mitral insufficiency. The patients were followed up for a period of 4 to 35 months (mean 14 months) with a total of 112 patient months. The result of the operation was very good and all patients with retarded growth curve preoperatively showed a marked acceleration of their growth curve after operation. The operative results in this group of patients are independent of age and weight at the time of operation but appear to be influenced by associated cardiac anomalies and by the quality and quantity of atrioventricular valve tissue available for reconstruction.