Loren's advice is very good. Its amazing what fresh unaltered, preservative free food will do for the body. As well, if you have the funds, a second opinion may be in order.
Have to give our local guys a plug. Houston, TX medical center has one of the best heart and cancer centers in the US, maybe the world. People come here from all over the world for treatment. I wouldn't stop at one opinion, if your Dr's. say they can't do any more, find someone that may provide a better answer.