Hello Saikat, Basically, there are two types of treatment - cardiac catheterization and open-heart surgery for ASD. As mentioned the ASD is of 10 mm, it can be treated with cardiac catheterization. In your case, pulmonary hypertension (PH) is not there which a good sign. But ultimate call will be taken by a cardiologist on examining and reviewing her case. So please take a cardiologist's opinion for desired guidance, our page will put you in line with them - Best Cardiologist in India. Hope our answer helps you.