(emboldening mine)Malden wrote:BooBear wrote:@ Malden: I am not sure that it makes a difference.
All our veins have valve to ensure only one flow- including the IJVs. If blood could never flow into the brain, as you theorize below, why are the valves there?
Valve in vein is primary for helping blood below hart level to climb up to the hart. Blood above hart level can return to the hart without asistence of the valves, simply by gravitation. And in many cases is reported that neck veins dont have valves or valves are undeveloped or incompetent (cannulation and catheterization of the IJV may cause persistent incompetence of the IJV valve).
The problem with that idea is that the IJVs return blood when the body is supine, in which case gravity has no part in the return. The vertebral veins can rely on gravity, and I am uncertain if they are valved.
1eye wrote:The heart valve can be part of it if a certain condition exists: tricuspid insufficiency. The heart valve on the right side that prevents reflux of venous blood between heart chambers, fails: it has symptoms much like (indistinguishable from?) 'MS'/CCSVI. In this case the reflux will be much more pulsatile, so we should be able to distinguish, and it should be harder for gravity to overcome it.
I'm new here. I just wanted to say that the Swedish study was seen here in Sweden as a "commissioned job". Really bad work.
But, we work hard to make the CCSVI happen here in Sweden too inspite of our neurologists.
Thanks to all of you working to get the world to know about CCSVI!
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