I totally agree with the vascular association. I am a 30 + year sufferer of Meniere's having encountered every aspect of the syndrome. I opted not to have the balance nerve cut, as did my brother, for the vertigo. Instead, I had drops of medication injected into the eardrum and I haven't had an attack since 2009.  I still suffer from 24/7 tinnitus, hearing loss, and fullness, but, at least I know up from down. There are many members of my family that suffer from this syndrome and or migraines, and or strokes, hence, my belief of the direct association.