My electrophysiologist says I need a pacemaker because my heart does not increase its rate with stress and therefore I am out of breath frequently and cannot tolerate much activity. I am on flexanide, metropolol and a blood thinner. I think it is called xantes?? Anyway I am concerned because they cannot say for sure if they have damaged my sinus node/ heart pacemaker with my three ablasions or if this is a side effect of my meds. With the short term reduction of the metropolol/beta blocker I went immediately back into afib and had to increase it again to baseline. If this is a medication side effect could something other that flecanide help? Has anyone added a pacemaker and had good results. I know the pacemaker will not help Afib but might push my heart rate and let me have more normal activity. Any advice or ideas greatly appreciated. i get fairly discouraged with this. I am 62 and my husband and I have two disabled adult sons at home that we adopted when they were little. We are also raising two grandchildren. Therefore I work full time running my company to keep the money flowing. My Husband is retired with luekemia. Therefore I really must keep moving and I have so much more that I want to do.