Having had asthma since I was 11 years old, my Doctor didn't put me on Beta Blockers because of this condition. However, since my asthma rarely causes me problems now (after giving up certain foods) my EP prescribed Beta Blockers because he thought my heart rate was still too high at around 87 bpm. After 8 days on the Beta Blockers, one evening my heart suddenly started to give little 'jolts' for a while, which I decided wasn't problematic and I ignored it. The next day, I took my blood pressure, which was normal...but my heart rate registered as only 54. Great! The EP had said this was what he was hoping for. Am I right to assume that the Beta Blockers have just slowed my heart rate whilst still in AF or is it possible that I am now back into sinus rhythm? Can Beta Blockers do that? I'm thinking not....just hoping. I am booked in for a cardio version on 22nd September and wondering if it will go ahead now that my heart rate is down...or whether my heart rate doesn't matter...whilst I'm in Afib, I still need to have the cardio version to try to get me back into sinus rhythm. I wish I had thought to ask these questions when I saw the EP!