Just thought I'd chime in with the fact that I have had quite a few heart attacks and nobody's mentioned one of the overriding sensations I repeatedly had, and

Just thought I'd chime in with the fact that I have had quite a few heart attacks and nobody's mentioned one of the overriding sensations I repeatedly had, and that was one of having a belt tightened around my chest. Like there was literally somebody stood behind me tightening the thing, and the longer it went on the more it felt like an iron band was clamping tighter and tighter. Not fun. That's also one of the terrible things about anxiety bringing on these types of symptoms, if you've already had a heart attack and subsequently you have an anxiety attack which brings on similar symptoms there is just no way to discount anything (for me). Also not fun. Luckily the heart attacks I had weren't the result of an underlying problem with my heart, it was because I was going in to urine retention which caused either sodium or potassium to build up in my system causing all the problems. I can never remember which one it was! But seriously, if you feel the symptoms get help.