Today I am 4 weeks post op getting a mechanical aortic valve and graft. Everything was going wonderful and yesterday I started getting pain in my neck and left shoulder blade. I had to take Percocet to sleep and once again in the morning. I had stopped taking them 10 days ago and was doing fine. I was at my office today and the medication wore off. My staff insisted I go to Dr. I called in to my GP and got an appointment with a PA immediately. 2 hours later I had blood work, EKG and chest x-ray. Everything appeared to be normal. I was told it was either muscular or some irritation to lining of diaphragm or something like that. I got a Percocet refill and was told to do stretching exercises and put heat on it. I have read on the posts before about shoulder and neck pain and mysterious pains that surface weeks after surgery. Can anyone share similar experiences?