It really is a question. The wonderful Dr Dake has been performing MRV's (as well as dopplers and doing some poking about during the operation), however, reading Zamboni's papers, I read things that in my simple mind, may or may not show up on an MRV or a non-specific CT scan (by that I mean with no catheter injecting dye). I do not know.
From the paper presented at the Charing Cross conference:
Histological examination of the involved veins reveals unequivocally the presence of characteristic signs of impaired venous drainage, such as perivenous iron deposits and fibrin cuffs, particular to chronic venous insufficiency.
OK, I don't know if these are actual abnormalities, or the results / tell tale signs of the abnormalities existing
ahhh... you can bold the whole next quote...
Most cases involved membranous obstructions of the junction with the superior vena cava, or, less frequently, twisting, septums and atresias as can be seen in the x-rays in figure 1.
Membranous obstruction of the outlet of the azygous vein into the superior vena cava can be successfully managed by simple balloon dilation. This procedure was performed in 38 out of 77 cases, and no recurrence was recorded at 1 year.
PS: does anyone have a searchable version of this document? Bueller.... Bueller....