I got a crt pacemaker 2 years ago and have been dealing with lack of sleep, so much so, that I thought I had fatal insomnia. Was told by technician they never heard of anything like that. I know what your thinking....anxiety. No....I have had a pacemaker since 1999 at 25 years of age. Mechanical heart valve surgery left me with heart block. A dddr was placed with 2 leads. I slept fine. Battery wore out, got a new pacemaker, slept fine. 2 years ago they said my heart was weakening and I needed a third wire. Got a CRT pacemaker and 3rd wire. Noticed my whole torso was pacing(thimping), Also noticed I could not sleep. 2 weeks later they adjusted to pm and the thumping in the torso stopped. Went home, and no sleep was still a problem. At it's worse I was going 7 days without sleep. There's alot more to this, but I don't want to make it very long. I am now given some benzos that help me sleep, but not enough for everyday use. I have gone to sleep study. I guess they were looking for sleep apnea, but nothing could be noted because I did not and do not sleep. If anyone had this and fixed it please let me know. I am sure it's the pm, I don't feel the same with this new one, heart beats harded, people can hear my heart now. I go to the VA and it is rather dismissed, and I am exhausted..