Thank you for writing in.
With your history I am assuming that your child has ventricular septal defect
for that is the defect which closes. It appears from the information you provided that hole is small and there are more than 60% chances it will close by the time your child is 4 years old. Such small holes do not cause any problem in childhood even when they are open. Get back to us if the hole does not close for that is also compatible with normal life span with certain precautions. We will cross that bridge when we reach that stage.
Dr Anil Grover