Tetralogy of Fallot is a complex precocious heart disease that requires early surgery once a child is diagnosed. What is tetralogy of Fallot? Tetralogy of Fallot is a combined congenital cardiovascular malformation that includes four conditions: pulmonary artery port stenosis, ventricular septal defect, right aortic position, and right ventricular hypertrophy. The common symptom of tetralogy of Fallot is the appearance of cyanosis, which can appear after birth or within a few weeks and gets progressively worse. Once a child is diagnosed with tetralogy of Fallot, early surgery is required, and children after six months can usually be followed directly. The common symptoms of infantile tetralogy of Fallot: Infantile tetralogy of Fallot is a common cyanotic congenital heart disease, symptoms can appear after birth or within a few weeks, manifesting as cyanosis, and gradually worsen. It usually becomes progressively purple after birth, purple when crying, and gradually appears to be cyanotic even when calm. In severe cases, the whole body may appear purple right after birth. Of course, generalized purplishness can also be seen in other heart diseases. Patients with tetralogy of Fallot, if not treated early, will have developmental delay due to ischemia and hypoxia in the body and brain, affecting the neurological development of the brain. Even sudden death, and some died in a few months old. 2, infants and children with tetralogy of Fallot treatment program: infants and children with tetralogy of Fallot treatment, we advocate that treatment within 12 months of birth is better. If the child’s pulmonary artery is well developed, it is more suitable for follow-up surgery around 6 months of age; if the pulmonary artery is finely developed, our team of pediatric cardiac surgery experts at Shanghai Yuanda Cardiothoracic Hospital recommends palliative surgery at 3 months of age. Because infants and young children are in a period of rapid growth and development, surgery is done as early as possible in order to relieve and control the condition as much as possible. Doing so can promote the development of the pulmonary vascular and cardiovascular systems, create favorable conditions for the next step of follow-up treatment, and improve the quality of life and relieve the symptoms of the child better after surgery. We also found that if the child is older before palliative surgery, the results are not very satisfactory. Generally, after 3-6 months of palliative surgery, the pulmonary artery development is better, and then a one-time follow-up surgery can be done. 3, postoperative considerations for tetralogy of Fallot The results of surgery for tetralogy of Fallot are very satisfactory. Usually, after successful surgical treatment, patients will have significant improvement in symptoms of tetralogy of Fallot, cyanosis will disappear, mobility will increase, and most of them will be able to participate in heavy physical labor. Although it is not exactly the same as normal people after surgery for tetralogy of Fallot, they can go to school and work completely. After surgery for tetralogy of Fallot, it is still important to pay attention to taking medication on time, keeping warm, avoiding colds, avoiding lung infections, and controlling the amount of activity for patients with tetralogy of Fallot who can walk. In general, three months, six months and one year are required for post-operative review. If all aspects are good in these three examinations after surgery for tetralogy of Fallot, there is no need to review again. Unless there are special circumstances that require follow-up.