Thanks for your thoughtful responses to my first post. Since I wrote I have had a 24 hour monitor fitted and a follow-up visit to a cardiologist. I handed the cardiologist my post and let her read it. She felt my pulse and said that it was erratic and I had a further ECG. The result of my 24 hour trace showed that I was experiencing ectopic beats for 19% of the time and that both atrial and ventricular chambers had arrhythmias. I was prescribed sotolol 40mg twice daily - a low dose but I seem to be sensitive to all medications. I was taken off Add to bisoprolol. One of my concerns was that I didn't know if the pulsing I was experiencing was due to AF or ectopic beats. Probably a mixture! I feel reassured that it is mostly ectopic beats.