I wore an event monitor for a month, it showed some episodes of abnormally high heart rates (169). Normally my rate is between 58 and 75. I am obese (working on this), have high cholesterol, triglycerides, and take Lipitor. It wasn t clear how they could tell if the heart rate was due to me climbing stairs etc. The nurse who called me said something about my heart chamber and asked if I wanted to take medication. I guess my question is what caused the high rate, what can I do, and how concerning is this? Thanks