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Article Abstract
Background: This study aimed to evaluate the long-term outcomes of partial and transitional atrioventricular septal defect repair, focusing on left atrioventricular valve reoperation.
Methods: We conducted a retrospective review of 104 children who underwent partial or transitional atrioventricular septal defect repair between August 1983 and January 2021. The major outcomes included patient survival and left atrioventricular valve reoperation.
Results: Median age at repair was 4.0 (0.1-17.0) years, with 17 patients being infants (age ≤ 1 year; 16.3%). All but eight patients (92.3%) underwent left atrioventricular valve cleft closure. After initial repair, there were 18 cases of moderate-to-severe left atrioventricular valve regurgitation (17.3%). Three in-hospital deaths (2.9%) and four late deaths (3.8%) occurred. At follow-up (median 14.3 years), actuarial survival was 95.1% and 93.0% at 1 and 20 years, respectively, and 16 patients (15.4%) had undergone a total of 19 left atrioventricular valve reoperations. Initial repair performed during infancy was associated with significantly higher mortality than a repair performed after infancy (35.3% vs 1.5%, < .01, hazard ratio = 26.4). On multivariable analysis, repair during infancy was associated with mortality ( < .01, hazard ratio = 27.4, 95% confidence interval = 2.7-283). Partial or no cleft closure of left atrioventricular valve ( = .03, hazard ratio = 4.7, 95% confidence interval = 1.2-18.8) and moderate-to-severe left atrioventricular valve regurgitation after repair ( < .01, hazard ratio = 9.9, 95% confidence interval = 3.0-32.2) were associated with left atrioventricular valve reoperation.
Conclusions: Partial and transitional atrioventricular septal defect repair outcomes were generally satisfactory. However, repair during infancy had worse survival outcomes, and moderate-to-severe left atrioventricular valve regurgitation after a repair was associated with future left atrioventricular valve reoperation.
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