TY - JOUR
T1 - MRI-Guided Thrombolysis for Stroke with Unknown Time of Onset
AU - Thomalla, Götz
AU - Simonsen, Claus Z
AU - Boutitie, Florent
AU - Andersen, Grethe
AU - Berthezene, Yves
AU - Cheng, Bastian
AU - Cheripelli, Bharath
AU - Cho, Tae-Hee
AU - Fazekas, Franz
AU - Fiehler, Jens
AU - Ford, Ian
AU - Galinovic, Ivana
AU - Gellissen, Susanne
AU - Golsari, Amir
AU - Gregori, Johannes
AU - Günther, Matthias
AU - Guibernau, Jorge
AU - Häusler, Karl Georg
AU - Hennerici, Michael
AU - Kemmling, André
AU - Marstrand, Jacob
AU - Modrau, Boris
AU - Neeb, Lars
AU - Perez de la Ossa, Natalia
AU - Puig, Josep
AU - Ringleb, Peter
AU - Roy, Pascal
AU - Scheel, Enno
AU - Schonewille, Wouter
AU - Serena, Joaquin
AU - Sunaert, Stefan
AU - Villringer, Kersten
AU - Wouters, Anke
AU - Thijs, Vincent
AU - Ebinger, Martin
AU - Endres, Matthias
AU - Fiebach, Jochen B
AU - Lemmens, Robin
AU - Muir, Keith W
AU - Nighoghossian, Norbert
AU - Pedraza, Salvador
AU - Gerloff, Christian
AU - WAKE-UP Investigators
PY - 2018/8/16
Y1 - 2018/8/16
N2 - BACKGROUND Under current guidelines, intravenous thrombolysis is used to treat acute stroke only if it can be ascertained that the time since the onset of symptoms was less than 4.5 hours. We sought to determine whether patients with stroke with an unknown time of onset and features suggesting recent cerebral infarction on magnetic resonance imaging (MRI) would benefit from thrombolysis with the use of intravenous alteplase. METHODS In a multicenter trial, we randomly assigned patients who had an unknown time of onset of stroke to receive either intravenous alteplase or placebo. All the patients had an ischemic lesion that was visible on MRI diffusion-weighted imaging but no parenchymal hyperintensity on fluid-attenuated inversion recovery (FLAIR), which indicated that the stroke had occurred approximately within the previous 4.5 hours. We excluded patients for whom thrombectomy was planned. The primary end point was favorable outcome, as defined by a score of 0 or 1 on the modified Rankin scale of neurologic disability (which ranges from 0 [no symptoms] to 6 [death]) at 90 days. A secondary outcome was the likelihood that alteplase would lead to lower ordinal scores on the modified Rankin scale than would placebo (shift analysis). RESULTS The trial was stopped early owing to cessation of funding after the enrollment of 503 of an anticipated 800 patients. Of these patients, 254 were randomly assigned to receive alteplase and 249 to receive placebo. A favorable outcome at 90 days was reported in 131 of 246 patients (53.3%) in the alteplase group and in 102 of 244 patients (41.8%) in the placebo group (adjusted odds ratio, 1.61; 95% confidence interval [CI], 1.09 to 2.36; P=0.02). The median score on the modified Rankin scale at 90 days was 1 in the alteplase group and 2 in the placebo group (adjusted common odds ratio, 1.62; 95% CI, 1.17 to 2.23; P=0.003). There were 10 deaths (4.1%) in the alteplase group and 3 (1.2%) in the placebo group (odds ratio, 3.38; 95% CI, 0.92 to 12.52; P=0.07). The rate of symptomatic intracranial hemorrhage was 2.0% in the alteplase group and 0.4% in the placebo group (odds ratio, 4.95; 95% CI, 0.57 to 42.87; P=0.15). CONCLUSIONS In patients with acute stroke with an unknown time of onset, intravenous alteplase guided by a mismatch between diffusion-weighted imaging and FLAIR in the region of ischemia resulted in a significantly better functional outcome and numerically more intracranial hemorrhages than placebo at 90 days.
AB - BACKGROUND Under current guidelines, intravenous thrombolysis is used to treat acute stroke only if it can be ascertained that the time since the onset of symptoms was less than 4.5 hours. We sought to determine whether patients with stroke with an unknown time of onset and features suggesting recent cerebral infarction on magnetic resonance imaging (MRI) would benefit from thrombolysis with the use of intravenous alteplase. METHODS In a multicenter trial, we randomly assigned patients who had an unknown time of onset of stroke to receive either intravenous alteplase or placebo. All the patients had an ischemic lesion that was visible on MRI diffusion-weighted imaging but no parenchymal hyperintensity on fluid-attenuated inversion recovery (FLAIR), which indicated that the stroke had occurred approximately within the previous 4.5 hours. We excluded patients for whom thrombectomy was planned. The primary end point was favorable outcome, as defined by a score of 0 or 1 on the modified Rankin scale of neurologic disability (which ranges from 0 [no symptoms] to 6 [death]) at 90 days. A secondary outcome was the likelihood that alteplase would lead to lower ordinal scores on the modified Rankin scale than would placebo (shift analysis). RESULTS The trial was stopped early owing to cessation of funding after the enrollment of 503 of an anticipated 800 patients. Of these patients, 254 were randomly assigned to receive alteplase and 249 to receive placebo. A favorable outcome at 90 days was reported in 131 of 246 patients (53.3%) in the alteplase group and in 102 of 244 patients (41.8%) in the placebo group (adjusted odds ratio, 1.61; 95% confidence interval [CI], 1.09 to 2.36; P=0.02). The median score on the modified Rankin scale at 90 days was 1 in the alteplase group and 2 in the placebo group (adjusted common odds ratio, 1.62; 95% CI, 1.17 to 2.23; P=0.003). There were 10 deaths (4.1%) in the alteplase group and 3 (1.2%) in the placebo group (odds ratio, 3.38; 95% CI, 0.92 to 12.52; P=0.07). The rate of symptomatic intracranial hemorrhage was 2.0% in the alteplase group and 0.4% in the placebo group (odds ratio, 4.95; 95% CI, 0.57 to 42.87; P=0.15). CONCLUSIONS In patients with acute stroke with an unknown time of onset, intravenous alteplase guided by a mismatch between diffusion-weighted imaging and FLAIR in the region of ischemia resulted in a significantly better functional outcome and numerically more intracranial hemorrhages than placebo at 90 days.
KW - Acute Disease
KW - Administration, Intravenous
KW - Aged
KW - Brain Ischemia/diagnostic imaging
KW - Diffusion Magnetic Resonance Imaging
KW - Female
KW - Fibrinolytic Agents/adverse effects
KW - Humans
KW - Intracranial Hemorrhages/chemically induced
KW - Magnetic Resonance Imaging, Interventional
KW - Male
KW - Middle Aged
KW - Stroke/diagnostic imaging
KW - Thrombectomy
KW - Thrombolytic Therapy/methods
KW - Time-to-Treatment
KW - Tissue Plasminogen Activator/adverse effects
KW - Treatment Outcome
U2 - 10.1056/nejmoa1804355
DO - 10.1056/nejmoa1804355
M3 - Journal article
C2 - 29766770
SN - 0028-4793
VL - 379
SP - 611
EP - 622
JO - The New England Journal of Medicine
JF - The New England Journal of Medicine
IS - 7
ER -