For atrial septal defects, many of them can heal on their own if they are less than 1.5mm in diameter, and for those who can heal on their own, they are the same as normal people after healing, so there is no need to worry excessively. If no abnormality of atrial septal defect is found after continuous monitoring for a period of time, it is not necessary to worry excessively in this case. The effect of atrial septal defect on heart function is relatively small, especially for small defects, which sometimes do not require treatment. For people with atrial septal defect, it is important not to catch a cold or get cold in order to prevent the symptoms of lung infection from aggravating the condition of atrial septal defect.