Hello! Thank you for asking on HCM! Regarding your concern, I would explain that your symptoms may be related to cardiac ischemia. What are your actual blood pressure values? A high or low blood pressure would explain the headache. The left arm pain is not typical of any brain ischemia. I recommend going to the ER for a careful physical examination, a resting ECG, chest X ray study and cardiac enzymes. Some blood lab tests would help exclude other metabolic causes. If all the above tests result normal, anxiety should be considered the main cause of this symptomatology. Hope to have been helpful! Best wishes, Dr. Aida