Conversation: The conversation between human and AI assistant.
[|Human|] As I sat down at the computer last night, I had a fluttery feeling in my upper chest closer to the heart.  It takes my breath away alittle and Its been happening for years.  I had 3 lastnight, one while lying in bed this morning and two more recently.  It feels like my heart is going to stop.
[|AI|]  Hello, This can be a cardiac arrhythmia like PSVT or atrial fibrillation, in which heart rate suddenly goes up and also suddenly decreases. ECG done during episodes will show abnormality. You may need 24 hour holder monitoring if ECG is normal. Also, hemoglobin and thyroid test should be done. In order to abort such episodes you should try to cough hard. Is there any stress or anxiety associated. Till the time your evaluation is complete, you can ask your local doctor for tab Collar LA 20 mg once a day. If none of the above is successful then last option is of electrophysiologist studies which is invasive test which can diagnose and treat the arrhythmia permanently in most of the cases. Hope this helps you and get back if you have any doubts. Take Care Regards