Single ventricle is a relatively rare congenital malformation lesion, it belongs to the cardiac surgery lesion, the main site of attack is the heart, the main symptoms of the disease are cyanosis, tachycardia, slow weight gain, etc.. The main causes of the disease are the following: 1) infection: viral infection may occur in early pregnancy, and the septum of the left and right ventricles may not form normally during the development of the fetus, thus seriously affecting the development of the fetus; 2) chromosomal aberrations: exposure to radioactive substances or drug abuse may cause chromosomal aberrations, resulting in fetal dysplasia and eventually leading to significant abnormalities in the heart structure. The situation of single ventricle appears.