Thanks, I have been taking medication for stomach acid anyway. This has been occurring for a few years. The first time I was in ambulance and after 3rd nitroglycerin tablet the pain went away completely. Since then has occurred quite a few times and since the nitro works I have a prescription for it. My question is does anyone else have this? I mean there is no difference between typical heart attack symptoms and this. The cold sweat, chest pains, left arm involved, responds to nitro, but no actual heart involvement just the pain. I don't typically get cramps and I feel better in cold weather. Well cold for California which is 45 in the winter where I am at. Just curious if this is related to MS?