medpage - Blood Velocity Predicts Brain Disease “The velocity of blood through the aortic arch is an independent predictor of cerebral microvascular disease, researchers reported...” http://www.medpagetoday.com/Neurology/GeneralNeurology/39390

Please have a closer look how (pale shadow behind the jugularis) such a "problem" looks like at a venography image of a CCSVI patient. https://www.facebook.com/photo.php?fbid=10150929907138701&set=pb.117471578700.-2207520000.1369541755.&type=3&theater


Venographie, Sonographie & MRV Aufnahmen von Stenosen
external compression (by the aortic arch) of the left Innominate vein