4.3 Article

Outcomes of Arterial Bypass for Posterior Circulation Atherosclerosis: A Case Series

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OPERATIVE NEUROSURGERY
卷 24, 期 2, 页码 145-153

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LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1227/ons.0000000000000481

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Posterior circulation stroke; Cerebral bypass; Atherosclerosis; Complications; Graft patency; Case series; Occipital artery

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This study evaluated the complications, graft patency, and postoperative outcomes of arterial bypass for posterior circulation intracranial atherosclerotic disease. The results showed excellent postoperative outcomes, with significant improvement in symptoms and good graft patency. No major complications were observed.
BACKGROUND:Extracranial-intracranial bypass is an effective treatment option for moyamoya disease and in well-selected cases of anterior circulation intracranial atherosclerotic disease; however, the effectiveness of bypass is less evident in posterior circulation atherosclerosis. Updated surgical techniques and clinical guidelines necessitate modern appraisal of arterial bypass for symptomatic patients with posterior circulation atherosclerotic disease who are refractory to medical management.OBJECTIVE:To evaluate the complications, graft patency, and postoperative outcomes of arterial bypass for posterior circulation intracranial atherosclerotic disease.METHODS:Perioperative records of consecutive bypass patients were retrospectively evaluated to determine the clinical course and surgical outcomes.RESULTS:Arterial bypass was performed in 8 cases with a median age of 62 years. All 8 patients underwent direct bypass with an autologous occipital artery donor vessel. Recipient vessel selection varied on a case-by-case basis, with the superior cerebellar artery used in 4 cases, the posterior inferior cerebellar artery in 3 cases, and the anterior inferior cerebellar artery in 1 case. There were no significant intraoperative or postoperative complications. Postoperatively, all 8 patients displayed clinical improvement of their preoperative symptoms, with a significant decrease of 2.5 points on the modified Rankin Scale (P < .001). Postoperative imaging confirmed full graft patency in 7 patients and partial patency in 1 patient.CONCLUSION:Excellent postoperative outcomes and no major complications after posterior circulation arterial bypass for intracranial atherosclerotic disease highlight the utility of this intervention for the treatment of medically refractory or symptomatic posterior circulation intracranial atherosclerotic disease. Larger studies may be valuable to validate these findings.

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