There are benefits and problems with doing valve surgery, and benefits and problems with not doing the surgery. If you are
in India, I might be able to assume that the
heart suffers from rheumatic fever changes, but it is speculation. Without seeing the echo pictures, it is impossible to specualte or guess on what course of action would be the best for your mother. 60 is a young age for valve surgery (relatively speaking), so that should not be a problem.