Whether or not a ventricular septal defect in an infant’s heart has any effect on the future depends on the size of the defect; a small defect will have little effect, while a large defect will affect the child’s growth and development, and may even affect life. If the defect is less than 0.5 centimeters, there is usually no obvious shunt, there may be no symptoms, and the child can be treated surgically when he or she grows up, and there is no effect on the patient’s future; If the defect is large it will seriously affect the child’s growth and development, and in infancy and early childhood there will be lethargy, weakness, interruption of milk intake, slow weight gain, and recurrent bronchopneumonia. In more severe cases where abnormal reflux occurs, the child can develop severe heart failure, which can affect the child’s life expectancy. For infants with ventricular septal defects, it is recommended to visit the cardiology department of the hospital as soon as possible to evaluate the condition. Mild cases can be observed first and wait until the right time for surgery, while severe cases need to be selected as soon as possible according to the condition to choose a reasonable treatment plan.