Just saw a two year old post from PMR Pro about irregular heart beat. I have not remembered that it was a part of the disease. I have recently been hospitalized with a heart rate of 176 beats per minute . I did not have a heart attack it was determined by tests. I feel that it was related to my not absorbing the prednisone and going into adrenal insufficiency. My cortisol level was 2.7 when I was admitted. They doubled my beta blocker and when I look at the information on that medicine it says that it stops adrenaline .... I have been on it in a lower dose for several years. Could the beta blocker be interfering with my absorption of prednisone?