1.What is congenital heart disease? Congenital heart disease is a cardiovascular disease from birth, including: atrial septal defect, ventricular septal defect, patent ductus arteriosus, tetralogy of Fallot, etc. 2.How to classify? (1) Non-cyanotic congenital heart disease: children usually do not have cyanotic manifestations and are usually seen during physical examination when a heart murmur is detected. For example: arteriovenous ductus arteriosus, atrial and ventricular septal defect, partial pulmonary venous malformation drainage, etc. (2) Cyanotic precocious heart disease: cyanosis appears immediately after birth or gradually afterwards. 3.Is congenital heart disease hereditary? There are certain genetic factors for congenital heart disease, but genetic factors do not necessarily lead to the development of the disease, it is also related to environmental factors, early pregnancy infection, medication, radiation exposure and other factors. 4.How to take care of congenital heart disease before surgery? (1) Combined with other diseases: such as liver and kidney function damage, acute infectious diseases, infectious rash, etc. If abnormalities are found, you should seek medical attention and go to the hospital for heart surgery after cure. (2) Prevention of respiratory tract infection: children with congenital heart disease such as arteriovenous ductus arteriosus, atrial and ventricular septal defects should be prevented from pulmonary infections. Once the infection is infected, it should be treated actively. (3) Children with cyanotic congenital heart disease: control the child’s activity, rest more, drink more water, and avoid strenuous exercise and crying. 5.How to care after surgery? (1) Prevent infection after surgery (2) Restrict strenuous activities and heavy physical labor for three to six months (3) Eat a general, semi-liquid, high-protein, low-salt, high-fiber diet, small meals, and do not overeat. Especially control the amount of fluid intake (20-40ml/hour for children aged 1-5 years, 40-80ml/hour for children aged 5-10 years, 80-120ml/hour for children aged 10-14 years) (4) Respect the doctor’s advice to take medication on time, do not stop medication at will, increase or decrease the amount of medication 5. 6. Post-operative examination? Post-operative review should follow the doctor’s advice. Generally, 3-6 months after surgery, we should review the electrocardiogram, chest X-ray, cardiac ultrasound, etc. If there is no abnormality, it will be reviewed after one year, and after 2 years, there is no need to review if there is no abnormality.