One day shortly after school started, the class teacher called and said that a heart murmur had been detected during the school physical and the doctor recommended further examination at the hospital. The doctor recommended a cardiac ultrasound, which revealed that Jing Jing’s atrial septum was not completely closed, which is known as congenital heart disease atrial septal defect, and under the doctor’s advice, Jing Jing had an interventional blocking surgery. Children with cyanotic congenital heart disease are divided into cyanotic and non-cyanotic types, and children with cyanotic congenital heart disease are more likely to be noticed because of cyanosis in the lips and extremities, while children with non-cyanotic congenital heart disease are found to have combined congenital heart disease due to frequent colds and pneumonia. However, these seemingly healthy children often grow up with potential dangers, for example, relatively small atrial septal defect, ventricular septal defect, arteriovenous ductus arteriosus often have no obvious symptoms, but are prone to bacterial endocarditis, once the heart valves and endocardium grow bacterial embolism can lead to serious consequences, such as embolism off the blood flow to the brain, brain embolism; flow to the lungs is pulmonary embolism; flow to the kidneys is renal embolism; relatively healthy children have congenital heart disease. The relatively large atrial septal defect, ventricular septal defect, and arteriovenous catheterization can lead to pulmonary hypertension due to the large amount of shunted blood, and the development of pulmonary hypertension to a certain degree can lead to cyanosis, which is called Eisenmenger syndrome in medicine, and most children have lost the chance of surgery at this time. Therefore, if a heart murmur is found during physical examination, parents should pay full attention to it and take their child to a specialist hospital in time to have a cardiac ultrasound examination under the guidance of a specialist to rule out congenital heart disease.