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Objectives To evaluates the clinical experience and outcomes of surgical repair of complete atrioventricular septal defect (TECD) with a two-patch and modify one-patch technique.Methods 48 patients with complete TECD undergoing complete repair with a two-patch or modified one-patch technique were reviewed between April 2010 and October 2012.The age of these patients at operation was 0.9 years (range, from 3 months to 22 years).The weight of these patients was 7.9 kg(range, fiom 4.8 to 47 kg).The morphological types included Rastelli A in 29, Rastelli B in 2, Rastelle C in 8 and intermediate type in 9 patients.10 patients had Down syndrome.Other complicated abnormalities included secundum atrial septal defect or single atrium in 20, patent ductus arteriosus in 7, pulmonary stenosis in 2 ,TAPVC in 1 and tetralogy of fallot in 1 patient.All patients underwent preoperative chest X-ray, electrocardiogram and echocardiogram.According to the results of eehocardiography, the common atrioventricular valve regurgitation was mild in 18 cases, moderate in 25 cases and severe in 5 cases.All patients reiceived preoperative inotropic and diuretic treatment for 2 to 4 weeks and after that underwent a complete surgical correction.Results 16 patients were performed one-patch or modified one-patch technique and other 32 patients were performed two-patch technique.The CPB time was 124.5 min, the mean occluding time was 90 min.The duration of mechanical ventilation time was 42 hours and ICU time was 4.5.The time in hospital was 11 days.One patient died of low cardiac output syndrome(the mortality rate was 2.2%).Other complications included residual VSD in 4 cases, complete atrioventricular block in 1 case, moderate mitral valve regurgitation in 2 cases and moderate tricuspid valve regurgitation in 3 cases.The survived 47 patients were regularly followed up for 3 to 32 months.It showed that the medium-term results was satisfying except that there were still moderate mitral valve regurgitation in 4 cases, moderate tricuspid valve regurgitation in 3 cases and residual VSD(1 ~ 3mm) in 3 cases.Conclusions With the improvement of surgical techniques and perioperative management, a satisfying short to medium term clinical results can be yielded for complete correction of total endocardial cushion defect in children with different ages.