Effect of extracranial lesion severity on outcome of endovascular thrombectomy in patients with anterior circulation tandem occlusion: analysis of the TITAN registry

Introduction Endovascular treatment (EVT) for tandem occlusion (TO) of the anterior circulation is complex but effective. The effect of extracranial internal carotid artery (EICA) lesion severity on the outcomes of EVT is unknown. In this study we investigated the effect of EICA lesion severity on the outcomes of tandem occlusion EVT. Methods A multicenter retrospective TITAN (Thrombectomy In TANdem lesions) study that included 18 international endovascular capable centers was performed. Patients who received EVT for atherosclerotic TO with or without EICA lesion intervention were included. Patients were divided into two groups based on the EICA lesion severity (high-grade stenosis (>= 90% North American Symptomatic Carotid Endarterectomy Trial) vs complete occlusion). Outcome measures included the 90-day clinical outcome (modified Rankin Scale score (mRS)), angiographic reperfusion (modified Thrombolysis In Cerebral Ischemia (mTICI) at the end of the procedure), procedural complications, and intracranial hemorrhage at 24 hours follow-up. Results A total of 305 patients were included in the study, of whom 135 had complete EICA occlusion and 170 had severe EICA stenosis. The EICA occlusion group had shorter mean onset-to-groin time (259 +/- 120 min vs 305 +/- 202 min;p=0.037), more patients with diabetes, and fewer with hyperlipidemia. With respect to the outcome, mTICI 2b-3 reperfusion was lower in the EICA occlusion group (70% vs 81%;p=0.03). The favorable outcome (90-day mRS 0-2), intracerebral hemorrhage and procedural complications were similar in both groups. Conclusion Atherosclerotic occlusion of the EICA in acute tandem strokes was associated with a lower rate of mTICI 2b-3 reperfusion but similar functional and safety outcomes when compared with high-grade EICA stenosis

Additional file 1: of Carotid artery stenting versus no stenting assisting thrombectomy for acute ischaemic stroke: protocol for a systematic review of randomised clinical trials with meta-analyses and trial sequential analyses

Preferred Reporting Items for Systematic review and Meta-Analysis Protocols 2015 (PRISMA-P). Recommended items to address in a protocol for a systematic review. (DOC 36.9 kb

Hemorrhagic Transformation After Thrombectomy for Tandem Occlusions

International audienceBackground and Purpose- Carotid artery stenting in tandem large vessel occlusion strokes is usually avoided because of the intracranial hemorrhagic risks induced by antiplatelet therapy during thrombectomy interventions. This study aimed to evaluate the incidence of hemorrhagic transformation following thrombectomy in large vessel occlusion strokes patients with atherosclerotic cervical carotid occlusion, associated factors, and clinical relevance. Methods- The TITAN (Thrombectomy in Tandem Lesions) collaboration pooled individual data of prospectively collected multicentric thrombectomy databases for consecutive anterior circulation tandem large vessel occlusion strokes patients who underwent thrombectomy. Hemorrhagic infarction (HI) and parenchymal hematoma (PH) were assessed within 24 hours. Results- Among 289 patients with atherosclerotic cause, 66 (24.7%) patients developed HI and 38 (14.2%) PH. Intracranial carotid occlusion, diabetes mellitus, absence of prior intravenous thrombolysis, and complete extracranial carotid occlusion were independent predictors of HI. Similar predictors were found for PH with addition of higher baseline National Institutes of Health Stroke Scale and Alberta Stroke Program Early CT Score <7. No detrimental effect of HI on 90-day clinical outcome was found. The occurrence of PH was associated with increased mortality rates (adjusted odds ratio, 2.63; 95% CI, 1.05-6.59; P=0.039) and had no detrimental effect on 90-day modified Rankin Scale 0 to 2 (adjusted odds ratio, 0.52; 95% CI, 0.20-1.28; P=0.25). Conclusions- Incidence of PH after tandem large vessel occlusion strokes thrombectomy is equivalent to those reported in the literature data for isolated occlusions. Similar predictors were found for PH and HI within 24 hours, whereas acute carotid artery stenting and antiplatelet therapy were not, suggesting an aggressive endovascular treatment of tandem occlusions

Inter- and Intra-Observer Agreement When Using a Diagnostic Labeling Scheme for Annotating Findings on Chest X-rays&mdash;An Early Step in the Development of a Deep Learning-Based Decision Support System

Consistent annotation of data is a prerequisite for the successful training and testing of artificial intelligence-based decision support systems in radiology. This can be obtained by standardizing terminology when annotating diagnostic images. The purpose of this study was to evaluate the annotation consistency among radiologists when using a novel diagnostic labeling scheme for chest X-rays. Six radiologists with experience ranging from one to sixteen years, annotated a set of 100 fully anonymized chest X-rays. The blinded radiologists annotated on two separate occasions. Statistical analyses were done using Randolph&rsquo;s kappa and PABAK, and the proportions of specific agreements were calculated. Fair-to-excellent agreement was found for all labels among the annotators (Randolph&rsquo;s Kappa, 0.40&ndash;0.99). The PABAK ranged from 0.12 to 1 for the two-reader inter-rater agreement and 0.26 to 1 for the intra-rater agreement. Descriptive and broad labels achieved the highest proportion of positive agreement in both the inter- and intra-reader analyses. Annotating findings with specific, interpretive labels were found to be difficult for less experienced radiologists. Annotating images with descriptive labels may increase agreement between radiologists with different experience levels compared to annotation with interpretive labels

Thrombectomy in Acute Stroke With Tandem Occlusions From Dissection Versus Atherosclerotic Cause

Background and Purpose-Tandem steno-occlusive lesions were poorly represented in randomized trials and represent a major challenge for endovascular thrombectomy in acute anterior circulation strokes. The impact of the cervical carotid lesion cause (ie, atherosclerotic versus dissection) on outcome of tandem patients endovascularly treated remains to be assessed. Methods-We retrospectively analyzed individual data of prospectively collected consecutive tandem patients treated with endovascular thrombectomy. The primary outcome was favorable outcome at 90 days (modified Rankin Scale score of 0-2). Secondary efficacy outcomes included successful reperfusion (modified Thrombolysis in Cerebrovascular Infarction scores of 2b-3), time to reperfusion, and safety outcomes encompassed procedural complications, symptomatic intracerebral hemorrhage, and 90-day mortality. Results-Among the 295 included patients, 65 had cervical carotid dissection and 230 had cervical carotid atherosclerotic cause. The rate of favorable outcome was 56.3% in the dissection group versus 47.6% in the atherosclerotic arm (center-,age-, and admission National Institutes of Health Stroke Scale-adjusted odds ratio, 1.08;95% confidence interval, 0.50-2.30;P=0.85). No significant differences were observed in secondary outcomes. The rates of successful reperfusion, symptomatic intracerebral hemorrhage, and 90-day mortality were 78.5% versus 74.5% (P=0.13), 4.6% versus 5.2% (P=1.0), and 7.8% versus 15.3% (P=0.94) in the dissection versus atherosclerotic groups, respectively. The median procedural time was 76 minutes (interquartile range, 52-95 minutes) in the dissection group and 67 minutes (interquartile range, 45-98 minutes) in the atherosclerotic group (P=0.24). Conclusions-We found no differences in the outcomes of patients with anterior circulation tandem atherosclerotic and dissection lesions treated with endovascular thrombectomy. Further studies are warranted

Abstract TP29: Complete Occlusion is Associated With Lower Recanalization Rate in Patients With Acute Stroke With Tandem Lesion Treated With Thrombectomy

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