Hai everyone,, I am grateful that I chanced upon this forum. I used to have palpitations due to anxiety and at the moment on atenolol 25mg once a day. Had been to cardiologist and every test seemed to be normal including blood pressure although sometimes it gets high to140/78 during stressful times.Morning and evening it is back to 110/70.When I exercise on treadmill for 20 min. I feel real tightness in the throat which lasts for a day and slowly disappears. Wonder if it is heart or stress related. It is quite scary.Of course I do have panic attacks sometimes and doc says it is stress related. Any help will be appreciated. Thanks for taking time to read this.