Thanks for writing in. I am a qualified and certified cardiologist. I read your question with diligence. By, pacemaker for arrhythmia
, I am assuming you mean Automatic Intra Cardiac Defibrillator (AICD) device.
Your doctor is absolutely right when he says that the problem is not in any way related to this pacemaker. It would be, that he has developed natural degeneration of joints of lower back region, a condition called osteoarthritis
(OA Spine) which can cause compression of sensory nerve
bringing sensations from buttock area. This can lead to pain. Rheumatologist
is joint specialist. After examination he may recommend x ray or CT scan
of spine. One point here is MRI scan is not advisable with these kind of pacemakers and it will be avoided. Treatment will be started after establishing the diagnosis. Good Luck.
Dr Anil Grover