I had my MI almost 2 years ago, have a stent, and am now "stable" according to my cardiologist. Now, I'm experiencing my first bad cold in years and I have a deep cough although my lungs are clear. It settled in my bronchial tubes. When I cough, I cough deeply & it racks my chest. The cough seems to be improving, but until it does I'm concerned about possible cardiac problems as a result. Do i have cause for concern?