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AJNR - American Journal of Neuroradiology

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Ultrasonographic Evaluation of Vertebral Venous Valves

Chi-Hsiang Chou^a, A-Ching Chao^a and Han-Hwa Hu^a

^a From the Neurovascular Section, Neurologic Institute, Veterans General Hospital-Taipei, National Yang-Ming University, Taipei, Taiwan

View larger version (58K): [in a new window]   FIG 1. Right vertebral venous valves (arrow) can be seen at the junction of the IJV, vertebral vein (VV), and brachiocephalic vein (BCV) under the B-mode image.

View larger version (59K): [in a new window]   FIG 2. B-mode, real-time imaging with color Doppler recording of vertebral venous valve’s opening and closing. VV, vertebral vein. A, During early opening phase. B, During opening phase. C, During closing phase.

View larger version (127K): [in a new window]   FIG 3. M-mode recording of both the internal jugular venous valve and vertebral venous valve. Arrow 1, valve opening; arrow 2, valve closing; VV, vertebral vein; BCV, brachiocephalic vein.