RT Journal Article T1 Mitral valve repair in the atrio-ventricular septal defect A1 Vera, Francisco A1 Sarria, Esteban A1 Ortiz, Almudena A1 Garcia, Nora A1 Conejo, Lourdes A1 Ruiz, Enrique K1 Atrioventricular septal defect K1 Atrioventricular valve K1 Valve repair K1 Mitral valve K1 Cleft K1 Surgical-correction K1 Complete form K1 Regurgitation AB Introduction and objectives: Complete atrio-ventricular septal defect accounts for 3% of congenital heart disease. Its prognosis depends on the status of the left atrio-ventricular valve after repair. We will analyse our results in terms of morbidity and mortality, and need for reoperation. Methods: Retrospective observational study, including patients who underwent a complete surgical correction of atrio-ventricular septal defect in our centre between January 2008 and July 2021. Results: 57 patients were treated. Median age and weight were 6 months and 5.8 kg respectively (inter quartile range 4-7 months and 4.8-6.7 kg). Inhospital mortality was 3 patients (5.3%). Of the patients, 7.2% required early reoperation to the left atrio-ventricular valve. Overall survival was 88.6% (median follow-up of 4.7 years; interquartile range: 1.5-10.9; complete follow-up in 93% of patients). Freedom from reoperation to the left atrioventricular valve was 83.7%. The left atrioventricular valve showed regurgitation lower than III / IV in 90.2% of the patients at the end of follow-up. Surgery before 3 months (p = .001), preoperative pulmonary hypertension (p = .007), and postoperative left atrio-ventricular valve stenosis (p = .001) were risk factors for mortality. Weight less than 4 kg (p PB Elsevier SN 1134-0096 YR 2022 FD 2022-06-05 LK http://hdl.handle.net/10668/22092 UL http://hdl.handle.net/10668/22092 LA en DS RISalud RD Apr 10, 2025