To date, there have been no randomized trials studying the use of different antiplatelet therapies or anticoagulation against antiplatelet therapy in known cases of extracranial vertebral artery ...

Vertebral arteries: 4–12mL; Aortic arch injection [4 vessel study]: 20–50mL; max 150mL. Intra-arterial (Peripheral arteriography): Subclavian or femoral artery: 5–40mL; Aortic bifurcation ...