Has anyone had this feeling before in there chest? I was upset with my son and the next the I know I feel this throb in my chest that only lasted about 2-3 seconds max. It felt almost like and electrical shock or a balloon expanding and deflating very quickly. It scared me beyond desription. I wonder if I was just upset and because I have been so fixated on my heart and chest area that I had some kind of a quick muscle spasm. When I used to get chronic headaches I remember having this feeling like something expanding and and deflating quickly in my head and finally got used to it happening every now and then. I just figured it was some kind of a muscle contraction due to being upset and tense. But this sensation in my chest is just too much. I thought I was it was the beginning of a heart attack or just heart failure. Any input is much appreciated.