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Fig 3. Right vertebral angiograms in lateral views (A and B) demonstrate the occluded vertebral artery (VA) and retrograde flow through the anterior spinal artery (ASA) and perfusion to pontine perforators after filling of the basilar artery at later phase (B, arrow) in patient 2. Angiograms in right anterior oblique view at early arterial (C) and later (D) phases reveals reversal (normalization) of blood flow through the ASA after successful stent-assisted recanalization of the right VA.
