Any sort of symptoms depends on the size and the location of the VSD. Small VSDs usually won't cause any type of symptoms, and might close on their own later on. Older kids or teens who have small VSDs that don't close usually have no symptoms other than the heart murmur which is the extra noise and if this is the case visiting a doctor is permitted. Medium and large VSDs that haven't been treated in childhood may cause noticeable symptoms. Babies may have faster breathing and get tired out during attempts to feed. They may start sweating or crying with feeding, and may gain weight at a slower rate. These signs generally indicate that the VSD will not close by itself, and heart surgery may be needed. This usually is done within the first 3
