i've been a lurker for several months. my name is john and 56/3 with unrecognizable symptoms for a number of years before the diagnosis. i'm active, definitely not a sitting type of guy. i walk daily and go to a health club when possible. i'm on sinemet cr and mirapex. they seem to be working fine except it seems as if ever since i started the mirapex, six months ago, i've developed shortness of breath and sometimes a pounding heart beat. i just returned from my cardiologist after a echo-cardiogram stress test. the results were normal and i've been advised that i can exercise however i want. has anyone had similar symptoms or anything involving the heart or lungs. appreciate any help. John 56/3