I'm trying to think how this all fits together... autoantibodies + HHV6 + CDR + mito fragment etc etc.
CDMRP Grants Power New Muscle and Mestinon Studies in ME/CFS
" Systrom believes that damage to the small nerve fibers (e.g. a small fiber neuropathy/polyneuropathy) is failing to constrict the blood vessels, allowing blood to escape into the interstitial spaces. "
This makes some sense to me actually, because it would seem to provide an explanation as to why some of us seem to sometimes benefit from the cold ( I used to go out a lot at night on my mobility scooter for example ).
I have experienced something that I never noticed when I was healthy which is noticeable variations in the perceptibility and phasing of the heart beat ( the time lag between both contractions of each side ), and its perceptibility ... sometimes its rapid and strong / hard to ignore ( at rest ), sometimes its slow and unfeelable which I would consider normal. I would describe one of these modes as 'shallow' heartbeat, which feels like its not being very efficient and the pressure changes in the body are lessened.
I usually just ignore this though as it isn't tied into any sort of scientific explanation.
I had experienced this just this morning before I went to bed... it made me need to lie down. but it felt different to orthostatic intolerance or POTS...it was neither, as I usually feel those in the brain, not the chest / whole body. So I think there might really be something going on with circulation, even at times when we don't feel particularly orthostatic intolerant.