I was told to seek help for heart rate over 140. With afib my heart rate approaches 200 and some docs have told me to try to stay home! I tend to go to the ER or call an ambulance because I have low blood pressure and any treatment lowers it further, so I need IV's.

I would ask your doctor. We don't know your situation. It is one of the main questions I ask cardiologists! I get different answers though!