This past Friday evening a friend of mine called and said she thought she was having a heart attack. Her arms were numb, she was short of breath, and had pain in her stomach and back. I told her to hang up and call 911. She did and I met her at the hospital. According to everything I've read, she had the symptoms of a heart attack. We spent the evening in the ER where they ran every test possible but everything turned out fine. The doctor came in, told her she was having an anxiety attack and prescribed an antidepressant. We had no idea that an anxiety attack could mimic a heart attack. She is now embarrassed and says she will never call 911 again. I am concerned about her because she isn't in the best of health to begin with and what if she really does have a heart attack now. How can we tell the difference??