Abstract W P426: Vascular Filling Defect Shape and Density Of Thrombus In CT/CT-Angiography Predict Results Of Thrombectomy

BACKGROUND: In acute thromboembolic stroke, mechanical recanalization with retrieval stents may result in immediate flow restoration and improve prognosis of patients. However, in up to 20% of cases, mechanical thrombectomy with stent retrievers results in poor angiographic outcomes (TICI 0-2a). Radiological findings on baseline CT scan and CT-angiography could predict recanalization rate and clinical outcome after thrombectomy. METHODS: We performed a retrospective analysis of patients with acute MCA or TICA occlusion treated with thrombectomy using retrievable stents between July 2010 to May 2014. We analyzed thrombus attenuations (Hounsfield Units, HU) in baseline noncontrast CT (NCCT), and shape of vascular filling defect in CT-angiography (CTA) that we correlate with arteriography study. Successful recanalization was considered with TICI 2b-3. RESULTS: A total of 183 patients were analyzed (142 had a M1 segment occluded, 25 a M2 and 16 a TICA occlusion on the admission CTA). Fifty-three percent of pa...