I was out walking with a friend of mine this afternoon and she suddenly felt quite ill and thought she was going to faint, thankfully she didn't! And managed to get home. She has AF and her heart rate went from 66 to 72. I would have thought that was perfectly ok and that she wasn't in AF but she took her PIP and insists her rate shouldn't go higher than 66. Is she over reacting? I think she is but she didn't look very well and now feels off colour and tired. HR back to 66. Any ideas ? As I have recently been posting about my HR I know how scary it is so don't want to poo poo her fears but rather offer reassurance.