I had a pacemaker implanted at the end of April this year. My natural pacemaker is working but I had total heart block, meaning that the electrical signal is not getting through to the ventricles. I had bradycardia, a slow hearbeat. On the Pacemaker Club site there are others with FMS or CFS. Just wondering if it could be a connective tissue disorder or some other problem that makes bradycardia or tachycardia more common amongst people with FMS or CFS. Or maybe it isn't more common at all. I've already done lots of searching with Google.