By establishing a warning scoring tool for the early "critical state" after congenital heart disease surgery, the multidisciplinary rapid response team is proactively activated, forming an integrated treatment model of early warning-team decision-making-organ assistance.

All children aged 0-14 years admitted to the PICU from 2021-2022 were enrolled continuously, and their baseline data such as gender, age, RACHS-1 score, cardiopulmonary bypass time, aortic clamping time, whether there was chromosomal lesions, whether there was preoperative endotracheal intubation/heart failure, changes in oxygenation index, lactate, and vasoactive drug scores were obtained. All variables that may lead to composite malignant events including death in the early postoperative period were included, including death, pulmonary hypertension crisis, malignant arrhythmias (supraventricular tachycardia, ventricular tachycardia, ventricular fibrillation, high-degree atrioventricular block) requiring antiarrhythmic drugs or pacemaker treatment, cardiopulmonary resuscitation, ECPR, emergency sternal expansion, severe AKI, severe ARDS, neurological complications (cerebral hemorrhage, cerebral infarction), gastrointestinal complications (gastrointestinal bleeding, intestinal obstruction, intestinal necrosis).The variables were included in the machine learning analysis to establish the model.

Inclusion Criteria:

• pediatrics admitted to ICU

Exclusion Criteria:

• surgery without cardiopulmonary bypass
• neonatal
• using extra-corporeal circulation during surgery
• Delayed chest closing during surgery

We included pediatrics with congenital heart disease who undergone surgery in our center.They should under 14 years old.

It included some private information.