is not a cause for it. It might be stiffening of chest muscles and may also some times because of hyper acidity. Rheumatoid Arthritis
may also affect heart, in such case the symptoms as you said may appear. Better under go the following investigations. R.A.Faactor, CRP, ASO Titre, ECG, Echo cardiogram, Lipid Profile
, RBS. So that you will have a clear picture behind your problem.
Dr. Surya Prakash Tadepalli