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  • Title: Revascularization of a Complex Case of Vertebrobasilar Insufficiency with Occipital Artery-Anterior Inferior Cerebellar Artery Bypass.
    Author: Madhani SI, Oushy S, Savastano L.
    Journal: World Neurosurg; 2023 May; 173():3. PubMed ID: 36791882.
    Abstract:
    Atherosclerotic disease is the most common etiology in causing posterior circulation strokes and can be found within the intracranial vertebrobasilar system.1 Endovascular and surgical approaches to treat this disease have been defined with both advantages and disadvantages.2,3 We present a case of surgical revascularization of a complex case of vertebrobasilar insufficiency with occipital artery (OA)-anterior inferior cerebellar artery (AICA) bypass (Video 1). A 56-year-old gentleman presented with severe, disabling, and progressive symptoms of vertebrobasilar insufficiency refractory to maximal medical management. Symptom onset was 2 years prior after suffering a left lateral medullary stroke due to a left vertebral artery (VA) occlusion. Angiography showed left VA occlusion after the origin of the posterior inferior cerebellar artery (PICA) and a hypoplastic right VA mostly ending in a PICA with a small and critically stenosed branch to the basilar artery. An initial attempt to revascularize the chronic totally occluded left VA using a combination of anterograde and retrograde (via PComm) approaches was unsuccessful. The decision was made to proceed with an OA-AICA bypass. The end-to-side anastomosis was conducted in the right cerebellopontine cistern and was uncomplicated. Postoperative angiography demonstrated a patent bypass with brisk OA-to-AICA flow with retrograde filling of the basilar artery and its branches. No perioperative strokes. The patient remained free of recurrent symptoms of vertebrobasilar insufficiency at 6 months' follow-up.
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