Ventricular septal defect of 2mm is not serious, it is a tiny defect, and can be reviewed regularly. If there are no special symptoms and it does not affect the growth and development and body resistance, it can be reviewed for a long time. Ventricular septal defect refers to the presence of one or more channels between the left ventricle and the right ventricle that should not be there, causing the mixing of blood between the left and right heart. If the defect is relatively small, under 5mm, it does not affect the hemodynamics of the body too much, so you can go to the hospital to clarify the site, type and size of the ventricular septal defect through ECG and cardiac ultrasound, and then decide the next treatment plan, to do minimally invasive interventional septal occlusion or repair through open-heart surgery in thoracic surgery.