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London, United Kingdom 2013 Poster Session Blue Cerebrovasc Dis 2013; 35 (suppl 3)1-854 851 955 Interventional neurology Periprocedural outcome of carotid artery stenting at tertiary hospital with high caseload in Korea J.H. Hong1, H.J. Bae2, O.K. Kwon3, G.J. Hwang4, C.W. Oh5, C. Jung6, M.K. Han7 Department of Neurology, Seoul National University Bundang Hospital, Seongnam, SOUTH KOREA1, Department of Neurology, Seoul National University Bundang Hospital, Seongnam, SOUTH KOREA2, Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam, SOUTH KOREA3, Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam, SOUTH KOREA4, Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam, SOUTH KOREA5, Department of Radiology, Seoul National Uni-versity Bundang Hospital, Seongnam, SOUTH KOREA6, Department of Neurology, Seoul National University Bundang Hospital, Seongnam, SOUTH KOREA7 Background and Purpose: CAS is required technical skill through the experience. The learning curve of CAS according to increasing procedure volume was conflicting. We aimed to investigate proce-dure- related complication with periprocedural outcome of CAS with learning curve at experienced and skilled center. Methods: We collected consecutive 416 cases (384 patients) with internal carotid artery stenosis for 9 years at single center. CAS was indicated in symptomatic (231 cases, 55.5%) or asymptomatic (185 cases, 44.5%) patients with stenosis of > 50% or >60%, respectively. Periprocedual outcome was defined as symptomatic stroke, myocardial infarction and death 1 month after procedure as well as immediate procedural complication. Procedure-related complication was composed of dissection, hemodynamic event and periprocedural outcome. When applying predictive variable in a multiple logistic regression model, an actuarial plot was created to predict procedure-related complication based on CAS volume. Results: Mean age was 68.8 years with a range 20-89 years and 82.8% were male. Patients adminis-tered antiplatelet and lipid-lowering medication before procedure were 99.3% and 56.0%. Embolic protection device were used for embolic infarction in 82.7%. Periprocedual outcome were 1.6% in asymptomatic group and 5.2% in symptomatic group. Overall rate of periprocedural outcome and procedure-related complication was 3.6% and 17.3%. In analyses adjusted by age, sex, symptomatic carotid stenosis and use of statin, procedure related complications composed of periprocedural out-comes and no symptom-related dissection and hemodynamic event were inversely associated with an increased procedure volume of CAS. Conclusions: Our periprocedural outcome of CAS compared to previous clinical trials may be com-parable to CEA. We suggest that CAS at well experienced, high caseload center may reduce the rate of procedure-related complication with periprocedural outcome with learning curve. 956 Interventional neurology Dural arteriovenous fistulas - prevalence in a Neuroradiology Service A.F. Santos1, F. Sousa2, J.M. Amorim3, C. Ferreira4, M. Ribeiro5, R. Maré6, J. Rocha7 Neurology Department, Hospital de Braga, Braga, PORTUGAL1, Neurology Department, Hos-pital de Braga, Braga, PORTUGAL2, Neuroradiology Department, Hospital de Braga, Braga, POR-TUGAL3, Neurology Department, Hospital de Braga, Braga, PORTUGAL4, Neuroradiology Depart-ment, Hospital de Braga, Braga, PORTUGAL5, Neurology Department, Hospital de Braga, Braga, PORTUGAL6, Neuroradiology Department, Hospital de Braga, Braga, PORTUGAL7 Background: Dural arteriovenous fistulas (DAVF) - abnormal vascular connections located within the duramater - account for 10-15% of all intracranial arteriovenous lesions. They are best diagnosed through conventional angiography. Methods: From our registry of consecutive angiography procedures we identified the ones that were performed for (confirmed) suspicion, control or endovascular treatment of DAVF, between Decem-ber 2011 and November 2012. We then proceeded to the analysis of the corresponding patients’ electronic processes and age, sex, clinical presentation and diagnostic exams were noted as were lo-cation and classification of fistulas, and endovascular therapy. Results: During the period of one year, 281 angiograms were performed, thirty (10.7%) in the con-text of FAVd corresponding to 14 patients - 57.1% female. The mean age at diagnosis was 54 years old. Presenting symptoms were as follows: headache (5 patients), seizures (3), tinnitus (3), visual changes (2), conjunctival chemosis (1), encephalopathy (1), hearing loss (1), encephalopathy (1), focal neurological deficit (1); asymptomatic (2). Four patients had a history of cerebral venous sinus thrombosis (CVST). Angiographic classification was: Cognard I (1), IIb (3), IIa+b (1), III (7), IV (1), V (1). There was fistula spontaneous resolution in 1 patient. The remaining underwent endovas-cular treatment, providing complete exclusion of DAVF in 8 patients (6 in a single session of embo-lization). Of the 5 patients with incomplete occlusion, 2 were submitted, till the present date, to only one session. Conclusions: This series shows the heterogeneity of DAVF presentation. Endovascular treatment was effective, obtaining complete exclusion of DAVF in 61.5% of patients, and most in a single ses-sion. Four of the patients had a history of CVST, which may raise questions regarding the appropri-ate follow-up time in this pathology.


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