<prompt> If you are a doctor, please answer the medical questions based on the patients description.so i am a healthy 32 year old female. i workout at the gym on a regular basis. i also perform triathlons and other event races. i started wearing my heart rate monitor again and noticed my hr getting in the 190s. today i had a max hr of 230. i have noticed not during my workouts but afterwards that i am having palpitations and almost like a fluttering feeling. but during my workouts i feel great. should i be alarmed??  <response>: Hello! Thank you for asking on Chat Doctor! Your symptoms may be related to anxiety. Anyway, I would recommend consulting with your attending physician and performing some tests to exclude other possible causes: - a cardiac ultrasound to examine your cardiac structure and function- an ambulatory 24-48 hours ECG monitoring to examine your heart rhythm trends during the day-some blood lab tests complete blood count for anemia, blood electrolytes for possible electrolytes imbalance, thyroid hormone levels for possible thyroid dysfunction. Hope to have been helpful! Kind regards, 