Hello! Thank you for asking on HCM! These symptoms seem to be related to anxiety. Does he have any bumps or swelling in his knees? An immunological disorder affecting the joints and the heart could mimic this clinical scenario. I recommend consulting with the GP for a careful physical examination, a resting ECG, a chest x ray and some blood lab tests: - complete blood count - PCR, sedimentation rate, fibrinogen - liver and kidney function tets - thyroid hormone levels - anti streptolysine O titer - blood electrolytes. If all the above tests result normal, the most probable diagnosis would be just pure anxiety. Hope to have been helpful! Best wishes, Dr. Iliri