I've been told by my doctor to go to casualty if the afib lasts longer than an hour - is he being extra cautious? What have other afibbers been told ? From posts I've read during the last year or so, it seems some afibbers have episodes varying in length ranging from minutes to days! To be told to go to casualty after an hour of AF seems a bit hasty. As I posted previously, I've been AF free for a year, but I'm well aware that can change overnight. Any thoughts on this?