Conversation: The conversation between human and AI assistant.
[|Human|] the other night i was laying down, my heart started to beat extremely fast and hard. i could hear it as clear as day and i could feel it pounding out of my chest. i couldn t breathe and then caught my breath. it hurt and it was really scary. what could this be?
[|AI|]  Hello, Your symptoms could be related to anxiety. Cardiac arrhythmia cannot be excluded either.  For this reason, I would recommend performing an ambulatory 24-48 hours ECG monitoring in order to examine your heart rhythm trends for a prolonged time and exclude possible cardiac arrhythmia.  Some blood lab tests are needed too (complete blood count for anemia, thyroid hormone levels for thyroid gland dysfunction and blood electrolytes for possible imbalance).  If all the above tests result normal, you should consider anxiety as the main cause underlying your complaints.  Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor.