Saw my local cardiologist today for sinus tachycardia (rate was 150). EKG normal, all labs normal, including TSH. I m 41 year old female, 8 year history of Ulcerative Colitis. Managed well. I always have a bit of a high rate, and it skyrockets due to white coat syndrome (I m an RN too). MD said did not require treatment, which I am fine with as symptoms do not bother me when they occur. Just wanted a 2nd opinion.