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[A Case Report of Basilar Artery Thromboembolism from Severe Stenosis of the Vertebral Artery Ostium].

We report a case of basilar artery embolism from the large thrombus of the right vertebral artery with severe stenosis of the vertebral artery ostium. Intravenous recombinant tissue plasminogen activator treatment and thrombectomy by catheter with reverse blood flow using a proximal subclavian artery blocking balloon(intentional subclavian artery steal phenomenon)were performed. A large thrombus along with other small thrombi were removed by an aspiration catheter. Additional stent placement was performed for residual vertebral artery stenosis, at ten days after the thrombectomy. Finally, the patient was discharged without any neurological deficits.