Catheter Ablation

Hi there, i had a successful catheter ablation procedure last September to remove an extra wire in the heart and everything went great and i felt good and back to normal within a few weeks.

about 4 months later (about January time) i started feeling weak and shaky in my arms and legs with a draining sort of feeling.

This feeling has been on and off for since January 2012 and i have been to the doctors for a blood check up about 3 months ago and they said my blood showed up fine. I regularly exercise and it doesn't seem to effect my performance but its just worrying me that my heart isn't functioning correctly and i was wondering if anyone else has experienced this after an ablation?