Liberation wrote: drsclafani wrote:
pklittle wrote:I am so confused.. is the current theory that ccsvi is a valve problem or not?
Yes, the valvular area is most commonly involved. It appears by ivus to be inability of the valves to open either by fusion or adhesion of the valve leaflets or developmental anomaly.
So, the stenoses of the vein does not mean a structural narrowing of the vein, it just gets less blood flow due to a narrow valve (narrow annulus or leaflet problems) and is this why it gets narrower?
the xray dye has to go through the valvular area. since the valvular area is narrowed, the xray dye column also gets narrowed. it looks like a stenosis caused by scar, caused by arteriosclerosis of an artery.....but the cause is so different.
So if I solve the valve problem the narrowing of the vein will disappear? So this way, my purpose should be not to dilate and harm the vein walls only treat the valves?
that is the goal
Are there cases when there is stenoses without valve problems? I guess then the vein has not developped properly and I must stretch the vein wall; however, I do not know how successful that would be?
there are also stenoses due to fibrosis and hypoplasia. we do not have data but i suspect that it might require more frequent dilatation.....but this is too premature. we are still attaining understanding of the nature of the stenosis.
and this is my theory based upon my interpretation of ivus....i am sticking my neck out