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Anomalous left coronary artery from the pulmonary artery in infants. Which operation? When?
Insights
Direct aortic reimplantation for anomalous left coronary artery from the pulmonary artery in children is effective. Early mortality is linked to left ventricular dysfunction, not age, and survivors show improved heart function and symptom relief.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Surgery
- Cardiovascular Surgery
Background:
- Anomalous left coronary artery from the pulmonary artery (ALCAPA) presents a surgical challenge in infants and children.
- The optimal surgical approach and timing for ALCAPA repair remain debated.
- Direct aortic reimplantation is one surgical option for this condition.
Purpose of the Study:
- To evaluate the outcomes of direct aortic reimplantation for ALCAPA in young patients.
- To identify risk factors for operative mortality in this patient group.
- To assess long-term functional recovery and graft patency after surgery.
Main Methods:
- A retrospective review of 22 patients under 4 years old who underwent direct aortic reimplantation of ALCAPA between 1977 and 1985.
- Analysis of operative mortality, risk factors, graft patency, and long-term clinical outcomes.
- Assessment of left ventricular function and mitral valve competence pre- and post-operatively.
Main Results:
- Five operative deaths (23%) occurred, with severe preoperative left ventricular dysfunction being the primary risk factor for mortality.
- No late deaths were observed during a mean follow-up of 38 months.
- All survivors, except one, were symptom-free, with patent coronary arteries (9/17 reevaluated) and significantly improved left ventricular function.
Conclusions:
- Direct aortic reimplantation is an effective procedure for ALCAPA, offering good graft patency and avoiding issues associated with other techniques.
- Left ventricular dysfunction is the key predictor of early mortality; careful patient selection and myocardial preservation are crucial.
- Surgical timing should be individualized: delayed repair for moderate dysfunction, urgent repair for severe dysfunction and heart failure.
Abstract:
The surgical management of anomalous left coronary artery from the pulmonary artery in infants and small children remains controversial, because the ideal surgical procedure and the optimal time for operation are yet to be determined. From 1977 to 1985, 22 patients less than 4 years of age (mean age 18.2 months) underwent direct aortic reimplantation of the anomalous left coronary artery. There were five operative deaths (23%, confidence limits 13%-36%). The determinant risk factor of early mortality was the severity of preoperative left ventricular dysfunction (p = 0.05), not age at operation (p = 0.64) or preoperative clinical status (p = 0.36). There were not late deaths (mean follow-up 38 months). All survivors but one were symptom free. The reimplanted anomalous left coronary artery was patent in each reevaluated case (9/17). Left ventricular function improved significantly in all survivors. Moderate to severe preoperative mitral incompetence lessened in all patients but one, without mitral valve repair. When technically feasible, direct aortic reimplantation of the anomalous left coronary artery is an attractive procedure because it offers a high rate of patency and avoids the potential drawbacks of procedures involving autogenous venous or arterial tissue. Optimal intraoperative myocardial preservation and institution of temporary left ventricular assistance at the end of the operation may decrease the operative risk. Left ventricular function nearly always recovers after successful revascularization, and resection of left ventricular myocardium is rarely indicated, if ever. Mitral incompetence almost always lessens, and the mitral valve should not be repaired at initial operation; however, residual mitral incompetence may necessitate reoperation in a few cases. In infants with moderate left ventricular damage (usually asymptomatic with medical therapy), surgical treatment should be delayed until 18 to 24 months of age so that it can be performed with a low operative risk. Infants with severely impaired left ventricular function and persistent congestive heart failure should probably undergo operation as soon as the diagnosis has been made.