I'v had a traumatic week with my first experience of AF - trip to A&E in an ambulance, treatment and sent home, then 2 days in hospital recovering from bad reaction to bisoprolol prescribed for first episode, second A&E ambulance, finally getting into the cardiology unit for 2 days. Have been sent home with very small dose of bisoprolol, 1.25, 'a mouse's dose' according to the cardiologist. In the hospital my heart rate was around 54 and it is still 52-54 now. I feel completely washed out and verging on dizzy. I felt fine this morning before taking the drug. Am I just 'in recovery' from the physical and emotional effects of my week, and getting used to the drug? It is disconcerting not being able to talk to any medical professionals over the weekend - the only option is A&E but am avoiding that unless an emergency.