Friend of mine just went in last week expecting a quad after having already done a triple a couple years back. Seems they got in for a look see and decided there wasn't enough blockage to warrant the full monty. Now he's wondering what the chest pain is all about? I told him - probably stress and worry after being told he need a quad bypass, eh ... ;-}
Anyway - I showed him a lot of the passive stretches and such I've been doing for the shoulders. I do know that getting the muscle tone "right" can make a big difference in pain levels in the chest as well, so he's gonna give that stuff a shot and see what happens.
This keeps up I may have a career in physical therapy in my future - lord knows I've gained my fair share of exposure to that in the last year ...