Heart Rate too slow after Heart Ablation

[wstalcup]

Hi, I had a Wolff-Parkinsons-White syndrome (unsymptomatic) but it showed up clear on EKG.  Heart Ablation was successful ..except now my resting heart rate is way too low.  42-44 bpm.  I am not an athlete of any sort and always tired, and sometimes dizzy when standing up.  After I had the heart ablation I have had an EKG, echo and heart MRI... all show everything is fine except for the slow heart rate.  I have tried Concerta 54 mgs which has raised my resting heart rate from the 40s to the 60s and that has helped a lot but its controlled, expensive, a real pain to keep filling every 30 days.  Can anyone recommend anything else?  I'm not so bad to actually need a pacemaker yet.. but being tired all the time has really hurt my quality of life.  Thanks for any suggestions!  (oh blood tests are all fine, nothing else out of the ordinary!)