PMC8770435_01
Non-invasive emergency imaging. Emergency imaging of a 70-year-old female patient with acute basilary artery occlusion (BAO), on. (A-D) Computed Tomography Angiography (CTA) in MIP reconstruction shows severe atherosclerosis of the aorta and cervical arteries (coronal plane), (A) a prolapsing stent of the common carotid artery into the aortic arch (white arrow, sagittal plane), (B) kinking and stenosis of the right subclavian artery (white dotted line) and an osteal right VA stenosis on the right (red arrow) with a steep-angled take-off from the subclavian artery (white dotted line, 3D reconstruction), (C) and distal occlusion of the basilary artery extending to both P1 segments of the posterior cerebral artery [*; white star, paracoronal plane, (D)].
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CT angiography (CTA) showed a distal basilar artery (BAO) occlusion, extending from the basilar tip into both proximal segments of the posterior cerebral arteries (PCA, P1 segment; Figure 1D). Regarding vascular access, a type three aortic arch, severe atherosclerosis of the supra-aortic vessels (Figure 1A), an occluded stent in the proximal common carotid artery (CCA) prolapsing into the aortic arch (Figure 1B), a direct take-off of the left severely long segmentally stenotic VA from the aortic arch immediately adjacent to the stent, and an osteal VA stenosis on the right with a steep-angled take-off from the subclavian artery were noted (Figure 1C).