1 year ago I had a panic attack and my heart beat was very fast. My trop t level was 3 that day. Since that day I'm having palpitations problems. I have done echo test 2 times, 1 TMT test and a 24 hrs holter monitoring from govt hospital and private clinic. All of these tests are normal and I've taken anxiety medicine for one month. Its better than before because now I know how I can control when palpitations starts. But when I start excercise then my heartbeats are so strong, I feel like something punching in my chest inside and due that I get scared and couldn't continue. Just want to know if there is any problem and still I should check it with any test. Palpitations occurs only when there is gas issue or exercising. Rest heatbeat is 50-80.