Had a heart attack in 2007. A 100% blocked artery, but no indication of clogged arteries or need for surgery. They did place a stent. I was 58 at the time and had been experiencing what I later found to be unstable angina 2 days prior to the MI. Have read that some heart attacks are the result of vasoconstriction, (sp?) and wonder if my having Raynaud s disease is related? I always have a lower than normal body temp too, usually around 96.8, but gets as low as 94 when ill. For the past year I ve been taking a vaso dilator, isosorbide, and have only had to take my nitro once in that time. Guess my actual question is how does being cold, Raynaud s, and heart attack relate?