Precardiac disease is very different from other diseases and requires a longer period of standardized follow-up after surgery. The purpose is: to see how the wound is healing; to evaluate the effect of surgery; to evaluate the status of cardiac function; to understand whether there are arrhythmias and other long-term complications; and to guide the adjustment of medication. In the early postoperative period (3-6 months after surgery): the review can be done every 1-2 weeks; according to the condition and medication, it can be gradually extended to once every 1-2 months; after recovery to normal, it can be done once every 3-6 months; afterwards, it can be done once every 1-2 years, generally 2 weeks, 3 months, 6 months and 1 year after surgery. 6 months and 1 year after surgery. In severe and complicated patients or children with chronic cardiac insufficiency and arrhythmia after surgery, the number of reviews should be more frequent; those who are unwell should be seen at any time. Simple precardiac disease (ventricular defect, atrial defect, patent ductus arteriosus, etc.) is usually followed up until after puberty, while patients with complex precardiac disease should be followed up from time to time according to their condition and doctor’s recommendation. When reviewing, you need to bring the discharge summary and the medical records of previous reviews, so that the physician can understand the operation, dynamically grasp the recovery of the child, medication and guide the treatment.