Hello Folks! Been feeling increasingly breathless this week, and tightness in chest, as well as lethargic. Then last evening went into A-fib again - enough to feel quite unwell but not my "bad" ("full") sort where I'm almost crawling along the floor. Didn't sleep well, felt short of breath. So went to GP this am and he was fantastic, checked everything, like a detective eliminating heart failure, chest infection etc. Explained as he went along too. Finally, convinced it's my daily 100mg Atenolol causing the breathlessness (dose was doubled from 50mg April when AF returned after being OK since 2010). So he's swapped the Atenolol for Bisoprolol 10mg "the preferred treatment now" . I am also on 125mcg Digoxin since April, and just stabilised on Warfarin. Seeing cardiologist tomorrow and hopefully will feel well enough to go away on Sunday to a static caravan in Scotland for a week. Been so scared I'd not be OK, and was on path to heart failure. I do get overly anxious which I'm sure doesn't help the AF which, by the way, has eased since I returned home from seeing the GP. Wonder what the cardiologist will say. Hope the Bisoprolol improves my life and there aren't any bad side effects. Told GP I used to live life in the fast lane till April often "meeting myself coming back" but would settle for a bit slower lane now......just a bit!!