Barb: About 6 wks post op I developed chest/shoulder/neck pain. Doctors thought it may be a reaction to statin (lipitor); another thought it was a repeat MI. It turned out to be pericarditis - a well known complication of CABG, but one that normally occurs sooner after surgery. I would think that your chest x-ray would have picked that up - although it did not in my case. Actually, the precise name for my condition was post cardiotomy syndrome. I dont know whether or not this helps in any way, but that was my story. Keep pushing until you get answera you are comfortable with. Dave C.