N Boulenoir1, G Turc1, H Henon2, N Laksiri3, F Mounier-Véhier4, I Girard Buttaz5, D-L Duong6, J Papassin7,8, M Yger9, A Triquenot10, A Lyoubi11, A Ter Schiphorst12, C Denier13, J-C Baron1, P Seners1. 1. Neurology Department, GHU Paris Psychiatrie et Neurosciences, Sainte-Anne Hospital, INSERM UMR 1266, FHU NeuroVasc, Université de Paris, Paris, France. 2. Inserm U1171, Degenerative and Vascular Cognitive Disorders, CHU Lille, Department of Neurology, Université de Lille, Lille, France. 3. Neurology Department, La Timone University Hospital, Marseille, France. 4. Neurology Department, Lens Hospital, Lens, France. 5. Neurology Department, Valenciennes Hospital, Valenciennes, France. 6. Neurology Department, Versailles University Hospital, Versailles, France. 7. Stroke Unit, Grenoble University Hospital, Grenoble, France. 8. Neurology Department, Chambery Hospital, Chambery, France. 9. Neurology Department, Saint-Antoine Hospital, Paris, France. 10. Neurology Department, Rouen Hospital, Rouen, France. 11. Neurology Department, Delafontaine Hospital, St. Denis, France. 12. Neurology Department, CHRU Gui de Chauliac, Montpellier, France. 13. Neurology Department, CHU Kremlin Bicêtre, Kremlin Bicêtre, France.
Abstract
BACKGROUND AND PURPOSE: Better understanding the incidence, predictors and mechanisms of early neurological deterioration (END) following intravenous thrombolysis (IVT) for acute stroke with mild symptoms and isolated internal carotid artery occlusion (iICAo) may inform therapeutic decisions. METHODS: From a multicenter retrospective database, we extracted all patients with both National Institutes of Health Stroke Scale (NIHSS) score <6 and iICAo (i.e. not involving the Willis circle) on admission imaging, intended for IVT alone. END was defined as ≥4 NIHSS points increase within 24 h. END and no-END patients were compared for (i) pre-treatment clinical and imaging variables and (ii) occurrence of intracranial occlusion, carotid recanalization and parenchymal hemorrhage on follow-up imaging. RESULTS: Seventy-four patients were included, amongst whom 22 (30%) patients experienced END. Amongst pre-treatment variables, suprabulbar carotid occlusion was the only admission predictor of END following stepwise variable selection (odds ratio = 4.0, 95% confidence interval: 1.3-12.2; P = 0.015). On follow-up imaging, there was no instance of parenchymal hemorrhage, but an intracranial occlusion was now present in 76% vs. 0% of END and no-END patients, respectively (P < 0.001), and there was a trend toward higher carotid recanalization rate in END patients (29% vs. 9%, P = 0.07). As compared to no-END, END was strongly associated with a poor 3-month outcome. CONCLUSIONS: Early neurological deterioration is a frequent and highly deleterious event after IVT for minor stroke with iICAo, and is of thromboembolic origin in three out of four patients. The strong association with iICAo site-largely a function of underlying stroke etiology-may point to a different response of the thrombus to IVT. These findings suggest END may be preventable in this setting.
BACKGROUND AND PURPOSE: Better understanding the incidence, predictors and mechanisms of early neurological deterioration (END) following intravenous thrombolysis (IVT) for acute stroke with mild symptoms and isolated internal carotid artery occlusion (iICAo) may inform therapeutic decisions. METHODS: From a multicenter retrospective database, we extracted all patients with both National Institutes of Health Stroke Scale (NIHSS) score <6 and iICAo (i.e. not involving the Willis circle) on admission imaging, intended for IVT alone. END was defined as ≥4 NIHSS points increase within 24 h. END and no-END patients were compared for (i) pre-treatment clinical and imaging variables and (ii) occurrence of intracranial occlusion, carotid recanalization and parenchymal hemorrhage on follow-up imaging. RESULTS: Seventy-four patients were included, amongst whom 22 (30%) patients experienced END. Amongst pre-treatment variables, suprabulbar carotid occlusion was the only admission predictor of END following stepwise variable selection (odds ratio = 4.0, 95% confidence interval: 1.3-12.2; P = 0.015). On follow-up imaging, there was no instance of parenchymal hemorrhage, but an intracranial occlusion was now present in 76% vs. 0% of END and no-END patients, respectively (P < 0.001), and there was a trend toward higher carotid recanalization rate in END patients (29% vs. 9%, P = 0.07). As compared to no-END, END was strongly associated with a poor 3-month outcome. CONCLUSIONS: Early neurological deterioration is a frequent and highly deleterious event after IVT for minor stroke with iICAo, and is of thromboembolic origin in three out of four patients. The strong association with iICAo site-largely a function of underlying stroke etiology-may point to a different response of the thrombus to IVT. These findings suggest END may be preventable in this setting.
Authors: Srikumar B Nair; Deepthi Somarajan; Rammohan K Pillai; Keerthi Balachandran; Sona Sathian Journal: Ann Indian Acad Neurol Date: 2022-03-10 Impact factor: 1.714