Abstract
BACKGROUND: Vertebral artery (VA) size, anatomy, and occlusion status should be considered when selecting endovascular access for basilar artery mechanical thrombectomy. In a patient with concomitant basilar artery and VA occlusion and a patent but hypoplastic contralateral VA, the occluded VA should be selected. The authors report a technique that utilizes advancing a guiding sheath with attached dilator via an occluded VA. OBSERVATIONS: A 65-year-old male presented with disturbed consciousness because of an acute infarction of the brainstem and cerebellum caused by a basilar artery occlusion. Cerebral angiography showed a hypoplastic right VA and occlusion of the left VA at the origin. A regular wire was easily advanced through the occlusion and a 4-Fr diagnostic catheter was advanced into the distal left VA. A 6-Fr guiding sheath with attached dilator was placed in the left VA beyond the occlusion by exchanging it over a long wire. After removing the basilar artery thrombus, balloon angioplasty was performed at the left VA origin. Complete revascularization of the posterior circulation was achieved. LESSONS: A guiding sheath with dilator can advance across and dilate a VA occlusion at the origin to provide rapid access to the basilar artery.