The paper analyzes the features of perioperative management of pediatric patients with congenital heart defects. The authors note that the perioperative period is the period starting from the moment of the beginning of the operation and ending with the moment of transfer of the patient to the ward after the operation. This period is very important for the recovery of children after surgery for a heart defect. In the perioperative period, indicators such as blood pressure, pulse, oxygen saturation, respiratory rate and other indicators are monitored to make sure that the patient is in a stable condition and there are no complications. In the perioperative period, measures are taken to prevent complications such as infections, bleeding, thrombosis, etc. Doctors also monitor the balanced administration of fluids and electrolytes to maintain the stability of the patient, and try to minimize the time of surgery to reduce stress for the patient and reduce the risk of complications. During the period under review, procedures are also carried out to support the postoperative period, such as the administration of medications and infusion solutions, maintaining body temperature and other procedures. In general, the perioperative period is of critical importance for the recovery of children after surgery for a heart defect. Proper monitoring of health indicators, prevention of complications, proper anesthesia and other procedures help children recover faster after surgery and reduce the risk of complications.