Hello! Thank you for asking on HCM! I understand your concern, and would advice to rule out any possible triggering factors for fast heart beating, like anemia, thyroid gland dysfunction, other organ dysfunctions, etc. I recommend to perform a medical check up with a careful physical examination, coupled with some blood tests (complete blood count, thyroid hormone levels, chest X ray study, liver and renal function tests, etc). If any suspicions for abnormally high heart rate is raised by the above examination, then an ambulatory ECG monitoring would be advisable. If everything result OK by the above tests, and only normal sinus tachycardia is present, then an investigation towards diagnosis of anxiety should be sought. Hope to have been helpful to you. Greetings! Dr. Iliri