椎骨動脈起始部高度狭窄に併発した赤色血栓による，脳底動脈塞栓症の1例

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

Ⅰ．はじめに

　今回われわれは，椎骨動脈起始部高度狭窄に併発した赤色血栓による，脳底動脈塞栓症を発症した症例を経験した．再塞栓を来し，カテーテルによって椎骨動脈起始部の血栓を摘出して血管形成術（ステント留置）を追加した．椎骨動脈起始部狭窄に併発した血栓をカテーテルで摘出した報告は渉猟し得なかったため，若干の文献的考察を加えて報告する．

　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.