Can membranous ventricular septal defect heal itself?

If the degree of membranous ventricular septal defect is less than 5 mm, it can heal itself before the age of two and will not affect the blood flow of the heart. Don't worry too much; if the membranous ventricular septal defect is greater than 5 mm and accompanied by heart murmur, surgery should be performed in time, and the nursing work of the child should be done well after surgery.