Complete endocardial cushion defects Type A are commonly treated with surgical repair of the defective deformity. Endocardial cushion defects, also known as atrioventricular septal defects or atrioventricular channel defects, are caused by developmental disorders during the fusion of the endocardial cushions of the ventricular inflow tracts in the embryonic period, and those with severe defects are characterized by profuse sweating, shortness of breath, difficulty in feeding, recurrent upper respiratory tract infections, growth retardation, and limited activity level. The treatment for endocardial cushion defect is surgical repair of the defective deformity, if diagnosed with complete endocardial cushion defect type A, should promptly go to a regular hospital, follow the doctor’s instructions for standardized treatment, so as not to delay the condition.