Long-term surgical results of anomalous origin of the left coronary artery from the pulmonary artery repair in infants and older patients.

Objectives: The objective of this study was to compare the long-term surgical results of anomalous origin of the left coronary artery (LCA) from the pulmonary artery repair between infants and older patients.

Methods: This is a retrospective study of patients undergoing anomalous origin of the LCA from the pulmonary artery repair between 1982 and 2018.

Results: Thirty-five patients were enrolled and divided into two groups based on their age: infants (<1 year of age: n = 11) and older patients (>1 year of age: n = 24). Median age was 5.2 months in infants and 6.3 years in older patients. The procedure included 24 LCA implantations and 11 intrapulmonary baffle repairs. Early mortality was recorded only in two infants (18%). Early complications included two low output syndrome (18%). Survival and freedom from reoperation at median follow-up of 17.2 years were not significantly different between groups (survival, 81.8 ± 11.6% vs. 94.1 ± 5.7% [p = .3846]; freedom from reoperation, 77.8 ± 13.9% vs. 90.0 ± 6.8% [p = .1175]). Mitral regurgitation (MR) developed substantially in two older patients in the long-term. In infants, significant improvements of fractional shortening (p = .0252) and left ventricular (LV) end-systolic (p = .0142) and end-diastolic diameter (p = .0157) occurred at 1 month.

Conclusions: Although there was no significant difference in survival and reoperation rate, the postoperative LV remodeling occurred more evident and rapid in infants. Worsening of MR in the long-term was observed only in older patients.