After My Husband Had An Ablation To Try To Correct

After my husband had an ablation to try to correct atrial fib, he started to have involuntary muscle jerks/twitches that he has about once or twice each night when he tries to relax in bed. The jerk/twitch lasts only a second or two. The ablation did not work so my husband still is in atrial fib and is taking Dig and Coumadin. The jerk/twitch is not just in one area of his body. Did the ablation procedure cause this? What causes the jerks/twitches and do we need to go to a neurologist or what kind of physician. My husband is a white 64 year old that is 6' 9" tall and weighs 360 pounds. The atrial fib causes my husband to be out of breath when he walks a short distance and he stays tired all the time. Any suggestions or info. Please help. E-mail is YYYY@YYYY