Start by calling your doctor. If you do not have a doctor, call your local hospital and see if they have a list of heart specialists who are taking new patients. Only a physician can answer this question with any kind of knowledge based on your over all health.
I don't know about the "normal" factor here is or what you consider that to be...life throws us some lousy punches..I'm sure the operation will make you better and that is always something to be grateful for!