I had undergone a cardiac By Pass surgery at Escorts hospital 4 months ago.While I am feeling much better after the surgery,I feel I am deep breathing and short of breadth while walking or climbing stairs.There is no pain but I am short of breath.I walk half an hour each both mornings and evenings but if you are by my side you can hear me take deep breath and pant if I halt and talk to you. Is it normal.I am taking one tab of fruselac ( earlier lasilactone) which induces frequent urination for 4-5 hours..What should I do as I do not enjoy walking .