question: Sir, My mother had a surgery for the bile stone almost one month back , and it is removed. But at the time of recovery period after surgery, she had breathing difficulties, later came to know as oxygen saturation problem was there. Some tests had done at the time while she was at ICU related to this, and the report saying as she is having cardiomegaly. Now her doctor suggested her to do endoscopy and echo test ?,I would lke to know, what would be her problem, is there any chances of cardiac related issues?