Hi. I ve been diagnosed with A-fib, and had a pacemaker installed in Nov 2016 to offset the effects of the beta-blockers. My heart no longer races as it once did while in A-fib, but I still suffer the effects that I associated with the A fib. Fatigue, shortness of breath, lightheadedness, brain lacks function. Very rare does my pulse indicate other than a normal beat though I do have difficulty finding my pulse at times. Very weak. My chest does flutter, though not like it use to. Is it possible to still be having A-fib or Atrial Flutter and only feeling the crappy side effect. Just to clarify, the local pacemaker clinic indicates their readings indicate that I ve only been in A-fib once since Nov 2016.I m having a bad afternoon, sorry if it doesn t make sense.