October 16, 2011

No wonder I feel dizzy

It makes sense that MS would affect the autonomic nervous system, something we don't talk much about since we usually deal with the muscle problems and cognitive problems and all that other messy stuff. But apparently, according to this study, we may be losing venous pressure while sitting.
Which a lot of us do a lot of.
PS: I think it's hilarious one of the researchers is named Venturi.
I still remember reading the deadly serious warnings on our BBQ about SPIDERS IN THE VENTURI TUBES. Of course when we looked at our BBQ after the long winter, mice had nested in it, and their woven bed made out of our lawn chairs had indeed prevented any spiders from seeking a home. But that's another topic.
Note, CCSVIers, this has nothing to do with blockages, so please don't fill my blog with "Aha! Proof!" rants. It's tiresome. And this is a preliminary study...needs repetition. Still, very interesting. I think we should be aware of the autonomic effects of MS as it may help explain the weakness that we feel and perhaps some of the vertigo.


Quantitative Colour Doppler Sonography Evaluation of Cerebral Venous Outflow: A Comparative Study between Patients with Multiple Sclerosis and Controls
summary: This interesting paper published by a group from Italy reports data from 27 healthy adults and 52 patients with MS. The difference between cerebral venous outflow (CVF) when lying down and CVF in the seated position which they refer to as ΔCVF was found to be negative in 59.6% of patients with MS and positive in 96.3% of healthy subjects. Statistical analysis showed that negative ΔCVF values were significantly associated with MS (p<0.0001). However there was no significant correlation with clinical variables.

The authors comment that negative ΔCVF has a hemodynamic significance, since it reflects an increased venous return in the seated position, and suggest that in MS it may be a result of vascular dysregulation from involvement of the autonomous nervous system.
authors: Monti L, Menci E, Ulivelli M, Cerase A, Bartalini S, Piu P, Marotti N, Leonini S, Galluzzi P, Romano DG, Casasco AE, Venturi C.
source: PLoS One. 2011;6(9):e25012. Epub 2011 Sep 22.
weblink: click here
category: Imaging
related research news: click here
    Multiple sclerosis
    Nervous system