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Ospel JM, Rinkel L, Ganesh A, Demchuk A, Joshi M, Poppe A, McTaggart R, Nogueira R, Menon B, Tymianski M, Hill MD, Goyal M. Influence of Infarct Morphology and Patterns on Cognitive Outcomes After Endovascular Thrombectomy. Stroke 2024; 55:1349-1358. [PMID: 38511330 DOI: 10.1161/strokeaha.123.045825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 02/23/2024] [Indexed: 03/22/2024]
Abstract
BACKGROUND To assess the association of qualitative and quantitative infarct characteristics and 3 cognitive outcome tests, namely the Montreal Cognitive Assessment (MOCA) for mild cognitive impairment, the Boston Naming Test for visual confrontation naming, and the Sunnybrook Neglect Assessment Procedure for neglect, in large vessel occlusion stroke. METHODS Secondary observational cohort study using data from the randomized-controlled ESCAPE-NA1 trial (Safety and Efficacy of Nerinetide in Subjects Undergoing Endovascular Thrombectomy for Stroke), in which patients with large vessel occlusion undergoing endovascular treatment were randomized to receive either intravenous Nerinetide or placebo. MOCA, Sunnybrook Neglect Assessment Procedure, and 15-item Boston Naming Test were obtained at 90 days. Total infarct volume, gray matter, and white matter infarct volumes were manually measured on 24-hour follow-up imaging. Infarcts were also visually classified as either involving the gray matter only or both the gray and white matter and scattered versus territorial. Associations of infarct variables and cognitive outcomes were analyzed using multivariable ordinal or binary logistic regression models. RESULTS Of 1105 patients enrolled in ESCAPE-NA1, 1026 patients with visible infarcts on 24-hour follow-up imaging were included. MOCA and Sunnybrook Neglect Assessment Procedure were available for 706 (68.8%) patients and the 15-item Boston Naming Test was available for 682 (66.5%) patients. Total infarct volume was associated with worse MOCA scores (adjusted common odds ratio per 10 mL increase, 1.05 [95% CI, 1.04-1.06]). After adjusting for baseline variables and total infarct volume, mixed gray and white matter involvement (versus gray matter-only adjusted common odds ratio, 1.92 [95% CI, 1.37-2.69]), white matter infarct volume (adjusted common odds ratio per 10 mL increase 1.36 [95% CI, 1.18-1.58]) and territorial (versus scattered) infarct pattern (adjusted common odds ratio, 1.65 [95% CI, 1.15-2.38]) were associated with worse MOCA scores. Results for Sunnybrook Neglect Assessment Procedure and 15-item Boston Naming Test were similar, except for the territorial infarct pattern, which did not reach statistical significance in multivariable analysis. CONCLUSIONS Besides total infarct volume, infarcts that involve the white matter and that show a territorial distribution were associated with worse cognitive outcomes, even after adjusting for total infarct volume.
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Affiliation(s)
- Johanna Maria Ospel
- Departments of Diagnostic Imaging (J.M.O., M.J., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
- Neurosciences (J.M.O., L.R., A.G., A.D., M.J., B.M., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
| | - Leon Rinkel
- Neurosciences (J.M.O., L.R., A.G., A.D., M.J., B.M., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
- Department of Neurology, Amsterdam University Medical Centers, Amsterdam, the Netherlands (L.R.)
| | - Aravind Ganesh
- Neurosciences (J.M.O., L.R., A.G., A.D., M.J., B.M., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
| | - Andrew Demchuk
- Neurosciences (J.M.O., L.R., A.G., A.D., M.J., B.M., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
| | - Manish Joshi
- Departments of Diagnostic Imaging (J.M.O., M.J., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
- Neurosciences (J.M.O., L.R., A.G., A.D., M.J., B.M., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
| | - Alexandre Poppe
- Centre Hospitalier de l'Université de Montréal, QC, Canada (A.P.)
| | - Ryan McTaggart
- Emory University School of Medicine, Grady Memorial Hospital, Atlanta, GA (R.N.)
| | - Raul Nogueira
- Emory University School of Medicine, Grady Memorial Hospital, Atlanta, GA (R.N.)
| | - Bijoy Menon
- Departments of Diagnostic Imaging (J.M.O., M.J., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
| | | | - Michael Douglas Hill
- Departments of Diagnostic Imaging (J.M.O., M.J., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
- Neurosciences (J.M.O., L.R., A.G., A.D., M.J., B.M., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
| | - Mayank Goyal
- Departments of Diagnostic Imaging (J.M.O., M.J., M.D.H., M.G.), Foothills Medical Center, University of Calgary, AB, Canada
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Chalet L, Boutelier T, Christen T, Raguenes D, Debatisse J, Eker OF, Becker G, Nighoghossian N, Cho TH, Canet-Soulas E, Mechtouff L. Clinical Imaging of the Penumbra in Ischemic Stroke: From the Concept to the Era of Mechanical Thrombectomy. Front Cardiovasc Med 2022; 9:861913. [PMID: 35355966 PMCID: PMC8959629 DOI: 10.3389/fcvm.2022.861913] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 02/11/2022] [Indexed: 01/01/2023] Open
Abstract
The ischemic penumbra is defined as the severely hypoperfused, functionally impaired, at-risk but not yet infarcted tissue that will be progressively recruited into the infarct core. Early reperfusion aims to save the ischemic penumbra by preventing infarct core expansion and is the mainstay of acute ischemic stroke therapy. Intravenous thrombolysis and mechanical thrombectomy for selected patients with large vessel occlusion has been shown to improve functional outcome. Given the varying speed of infarct core progression among individuals, a therapeutic window tailored to each patient has recently been proposed. Recent studies have demonstrated that reperfusion therapies are beneficial in patients with a persistent ischemic penumbra, beyond conventional time windows. As a result, mapping the penumbra has become crucial in emergency settings for guiding personalized therapy. The penumbra was first characterized as an area with a reduced cerebral blood flow, increased oxygen extraction fraction and preserved cerebral metabolic rate of oxygen using positron emission tomography (PET) with radiolabeled O2. Because this imaging method is not feasible in an acute clinical setting, the magnetic resonance imaging (MRI) mismatch between perfusion-weighted imaging and diffusion-weighted imaging, as well as computed tomography perfusion have been proposed as surrogate markers to identify the penumbra in acute ischemic stroke patients. Transversal studies comparing PET and MRI or using longitudinal assessment of a limited sample of patients have been used to define perfusion thresholds. However, in the era of mechanical thrombectomy, these thresholds are debatable. Using various MRI methods, the original penumbra definition has recently gained a significant interest. The aim of this review is to provide an overview of the evolution of the ischemic penumbra imaging methods, including their respective strengths and limitations, as well as to map the current intellectual structure of the field using bibliometric analysis and explore future directions.
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Affiliation(s)
- Lucie Chalet
- Univ Lyon, CarMeN Laboratory, INSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Olea Medical, La Ciotat, France
| | | | - Thomas Christen
- Grenoble Institut Neurosciences, INSERM, U1216, Univ. Grenoble Alpes, Grenoble, France
| | | | - Justine Debatisse
- Univ Lyon, CarMeN Laboratory, INSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Omer Faruk Eker
- CREATIS, CNRS UMR-5220, INSERM U1206, Université Lyon 1, Villeurbanne, France
- Neuroradiology Department, Hospices Civils of Lyon, Lyon, France
| | - Guillaume Becker
- Univ Lyon, CarMeN Laboratory, INSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Norbert Nighoghossian
- Univ Lyon, CarMeN Laboratory, INSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Stroke Department, Hospices Civils of Lyon, Lyon, France
| | - Tae-Hee Cho
- Univ Lyon, CarMeN Laboratory, INSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Stroke Department, Hospices Civils of Lyon, Lyon, France
| | - Emmanuelle Canet-Soulas
- Univ Lyon, CarMeN Laboratory, INSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1, Lyon, France
| | - Laura Mechtouff
- Univ Lyon, CarMeN Laboratory, INSERM, INRA, INSA Lyon, Université Claude Bernard Lyon 1, Lyon, France
- Stroke Department, Hospices Civils of Lyon, Lyon, France
- *Correspondence: Laura Mechtouff
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Slawski D, Heit JJ. Treatment Challenges in Acute Minor Ischemic Stroke. Front Neurol 2021; 12:723637. [PMID: 34557152 PMCID: PMC8452987 DOI: 10.3389/fneur.2021.723637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 08/11/2021] [Indexed: 01/12/2023] Open
Abstract
Patients with acute ischemic stroke may present with minor neurologic deficits. Acute treatment decisions depend on the disability imposed by the symptoms along with radiographic features. The presence of disabling neurologic deficits warrants intravenous thrombolysis, but the indications for endovascular therapy are less defined. The degree of disability, presence of a large vessel occlusion with perfusion mismatch, and collateral circulation status may all be factors in selecting patients for endovascular treatment. Identification of patients who are at risk for neurologic deterioration is critical to preventing poor outcomes in this patient population.
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Affiliation(s)
- Diana Slawski
- Department of Neurology, Stanford Health Care, Stanford, CA, United States
| | - Jeremy J Heit
- Department of Neuroimaging and Neurointervention, Stanford Health Care, Stanford, CA, United States
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4
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Dorn F, Herzberg M. Response to Letter to the Editor "Keeping Late Thrombectomy Imaging Protocols Simple to Avoid Analysis Paralysis". Clin Neuroradiol 2021; 31:813-814. [PMID: 34491366 PMCID: PMC8463341 DOI: 10.1007/s00062-021-01091-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/20/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Franziska Dorn
- Department of Neuroradiology, University Hospital Bonn, 53127, Bonn, Germany.
| | - Moriz Herzberg
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, 97080, Würzburg, Germany
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5
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Keeping Late Thrombectomy Imaging Protocols Simple to Avoid Analysis Paralysis. Clin Neuroradiol 2021; 31:811-812. [PMID: 34269829 DOI: 10.1007/s00062-021-01059-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 06/22/2021] [Indexed: 12/25/2022]
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Magoufis G, Safouris A, Raphaeli G, Kargiotis O, Psychogios K, Krogias C, Palaiodimou L, Spiliopoulos S, Polizogopoulou E, Mantatzis M, Finitsis S, Karapanayiotides T, Ellul J, Bakola E, Brountzos E, Mitsias P, Giannopoulos S, Tsivgoulis G. Acute reperfusion therapies for acute ischemic stroke patients with unknown time of symptom onset or in extended time windows: an individualized approach. Ther Adv Neurol Disord 2021; 14:17562864211021182. [PMID: 34122624 PMCID: PMC8175833 DOI: 10.1177/17562864211021182] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 05/10/2021] [Indexed: 02/05/2023] Open
Abstract
Recent randomized controlled clinical trials (RCTs) have revolutionized acute ischemic stroke care by extending the use of intravenous thrombolysis and endovascular reperfusion therapies in time windows that have been originally considered futile or even unsafe. Both systemic and endovascular reperfusion therapies have been shown to improve outcome in patients with wake-up strokes or symptom onset beyond 4.5 h for intravenous thrombolysis and beyond 6 h for endovascular treatment; however, they require advanced neuroimaging to select stroke patients safely. Experts have proposed simpler imaging algorithms but high-quality data on safety and efficacy are currently missing. RCTs used diverse imaging and clinical inclusion criteria for patient selection during the dawn of this novel stroke treatment paradigm. After taking into consideration the dismal prognosis of nonrecanalized ischemic stroke patients and the substantial clinical benefit of reperfusion therapies in selected late presenters, we propose rescue reperfusion therapies for acute ischemic stroke patients not fulfilling all clinical and imaging inclusion criteria as an option in a subgroup of patients with clinical and radiological profiles suggesting low risk for complications, notably hemorrhagic transformation as well as local or remote parenchymal hemorrhage. Incorporating new data to treatment algorithms may seem perplexing to stroke physicians, since treatment and imaging capabilities of each stroke center may dictate diverse treatment pathways. This narrative review will summarize current data that will assist clinicians in the selection of those late presenters that will most likely benefit from acute reperfusion therapies. Different treatment algorithms are provided according to available neuroimaging and endovascular treatment capabilities.
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Affiliation(s)
- Georgios Magoufis
- Interventional Neuroradiology Unit, Metropolitan Hospital, Piraeus, Greece
| | - Apostolos Safouris
- Stroke Unit, Metropolitan Hospital, Piraeus, Greece
- Interventional Neuroradiology Unit, Rabin Medical Center, Beilinson Hospital, Petach-Tikva, Israel
- Second Department of Neurology, National & Kapodistrian University of Athens, School of Medicine, “Attikon” University Hospital, Athens, Greece
| | - Guy Raphaeli
- Interventional Neuroradiology Unit, Rabin Medical Center, Beilinson Hospital, Petach-Tikva, Israel
| | | | - Klearchos Psychogios
- Stroke Unit, Metropolitan Hospital, Piraeus, Greece
- Second Department of Neurology, National & Kapodistrian University of Athens, School of Medicine, “Attikon” University Hospital, Athens, Greece
| | - Christos Krogias
- Department of Neurology, St. Josef-Hospital, Ruhr University Bochum, Bochum, Germany
| | - Lina Palaiodimou
- Second Department of Neurology, National & Kapodistrian University of Athens, School of Medicine, “Attikon” University Hospital, Athens, Greece
| | - Stavros Spiliopoulos
- Second Department of Radiology, Interventional Radiology Unit, “ATTIKON” University General Hospital, Athens, Greece
| | - Eftihia Polizogopoulou
- Emergency Medicine Clinic, National & Kapodistrian University of Athens, School of Medicine, “Attikon” University Hospital, Athens, Greece
| | - Michael Mantatzis
- Department of Radiology, University Hospital of Alexandroupolis, Democritus University of Thrace, School of Medicine, Alexandroupolis, Greece
| | - Stephanos Finitsis
- Department of Interventional Radiology, AHEPA University General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Theodore Karapanayiotides
- Second Department of Neurology, Aristotle University of Thessaloniki, School of Medicine, Faculty of Health Sciences, AHEPA University Hospital, Thessaloniki, Greece
| | - John Ellul
- Department of Neurology, University Hospital of Patras, School of Medicine, University of Patras, Patras, Greece
| | - Eleni Bakola
- Second Department of Neurology, National & Kapodistrian University of Athens, School of Medicine, “Attikon” University Hospital, Athens, Greece
| | - Elias Brountzos
- Second Department of Radiology, Interventional Radiology Unit, “ATTIKON” University General Hospital, Athens, Greece
| | - Panayiotis Mitsias
- Department of Neurology Medical School, University of Crete, Heraklion, Crete, Greece
| | - Sotirios Giannopoulos
- Second Department of Neurology, National & Kapodistrian University of Athens, School of Medicine, “Attikon” University Hospital, Athens, Greece
| | - Georgios Tsivgoulis
- Second Department of Neurology, National & Kapodistrian, University of Athens, School of Medicine, “Attikon” University Hospital, Iras 39, Gerakas Attikis, Athens, 15344, Greece
- Department of Neurology, The University of Tennessee Health Science Center, Memphis, TN, USA
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7
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Dekker L, Venema E, Pirson FAV, Majoie CBLM, Emmer BJ, Jansen IGH, Mulder MJHL, Lemmens R, Goldhoorn RJB, Wermer MJH, Boiten J, Lycklama À Nijeholt GJ, Roos YBWEM, van Es ACGM, Lingsma HF, Dippel DWJ, van Zwam WH, van Oostenbrugge RJ, van den Wijngaard IR. Endovascular treatment in anterior circulation stroke beyond 6.5 hours after onset or time last seen well: results from the MR CLEAN Registry. Stroke Vasc Neurol 2021; 6:572-580. [PMID: 33827915 PMCID: PMC8717786 DOI: 10.1136/svn-2020-000803] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 03/03/2021] [Accepted: 03/10/2021] [Indexed: 12/02/2022] Open
Abstract
Background Randomised controlled trials with perfusion selection have shown benefit of endovascular treatment (EVT) for ischaemic stroke between 6 and 24 hours after symptom onset or time last seen well. However, outcomes after EVT in these late window patients without perfusion imaging are largely unknown. We assessed their characteristics and outcomes in routine clinical practice. Methods The Multicenter Randomized Clinical Trial of Endovascular Treatment for Acute Ischemic Stroke in the Netherlands Registry, a prospective, multicentre study in the Netherlands, included patients with an anterior circulation occlusion who underwent EVT between 2014 and 2017. CT perfusion was no standard imaging modality. We used adjusted ordinal logistic regression analysis to compare patients treated within versus beyond 6.5 hours after propensity score matching on age, prestroke modified Rankin Scale (mRS), National Institutes of Health Stroke Scale, Alberta Stroke Programme Early CT Score (ASPECTS), collateral status, location of occlusion and treatment with intravenous thrombolysis. Outcomes included 3-month mRS score, functional independence (defined as mRS 0–2), and death. Results Of 3264 patients who underwent EVT, 106 (3.2%) were treated beyond 6.5 hours (median 8.5, IQR 6.9–10.6), of whom 93 (87.7%) had unknown time of stroke onset. CT perfusion was not performed in 87/106 (80.2%) late window patients. Late window patients were younger (mean 67 vs 70 years, p<0.04) and had slightly lower ASPECTS (median 8 vs 9, p<0.01), but better collateral status (collateral score 2–3: 68.3% vs 57.7%, p=0.03). No differences were observed in proportions of functional independence (43.3% vs 40.5%, p=0.57) or death (24.0% vs 28.9%, p=0.28). After matching, outcomes remained similar (adjusted common OR for 1 point improvement in mRS 1.04, 95% CI 0.56 to 1.93). Conclusions Without the use of CT perfusion selection criteria, EVT in the 6.5–24-hour time window was not associated with poorer outcome in selected patients with favourable clinical and CT/CT angiography characteristics. randomised controlled trials with lenient inclusion criteria are needed to identify more patients who can benefit from EVT in the late window.
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Affiliation(s)
- Luuk Dekker
- Neurology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Esmee Venema
- Neurology, Erasmus MC, Rotterdam, The Netherlands .,Public Health, Erasmus MC, Rotterdam, The Netherlands
| | - F Anne V Pirson
- Neurology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Charles B L M Majoie
- Radiology and Nuclear Medicine, Amsterdam University Medical Centre, Location AMC, Amsterdam, The Netherlands
| | - Bart J Emmer
- Radiology and Nuclear Medicine, Amsterdam University Medical Centre, Location AMC, Amsterdam, The Netherlands
| | - Ivo G H Jansen
- Radiology and Nuclear Medicine, Amsterdam University Medical Centre, Location AMC, Amsterdam, The Netherlands
| | | | - Robin Lemmens
- Neurology, University Hospitals Leuven, Leuven, Belgium.,Neurosciences, Experimental Neurology and Leuven Brain Institute, University of Leuven, Leuven, Belgium.,VIB, Center for Brain & Disease Research, Laboratory of Neurobiology, Leuven, Belgium
| | | | | | - Jelis Boiten
- Neurology, Haaglanden Medical Centre, Den Haag, The Netherlands
| | | | - Yvo B W E M Roos
- Neurology, Amsterdam University Medical Centre, Location AMC, Amsterdam, The Netherlands
| | - Adriaan C G M van Es
- Radiology, Haaglanden Medical Centre, Den Haag, The Netherlands.,Radiology, Leiden University Medical Centre, Leiden, The Netherlands
| | | | | | - Wim H van Zwam
- Radiology, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | | | - Ido R van den Wijngaard
- Neurology, Leiden University Medical Centre, Leiden, The Netherlands.,Neurology, Haaglanden Medical Centre, Den Haag, The Netherlands
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Mocco J, Siddiqui AH, Fiorella D, Alexander MJ, Arthur AS, Baxter BW, Budzik RF, Froehler MT, Hanel RA, Lena J, Persaud S, Puri AS, Rai AT, Wintermark M, Woodward K, Zhang X, Turk A. POSITIVE: Perfusion imaging selection of ischemic stroke patients for endovascular therapy. J Neurointerv Surg 2021; 14:126-132. [PMID: 33632884 DOI: 10.1136/neurintsurg-2021-017315] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 01/22/2021] [Accepted: 01/22/2021] [Indexed: 11/04/2022]
Abstract
BACKGROUND The PerfusiOn imaging Selection of Ischemic sTroke patIents for endoVascular thErapy (POSITIVE) trial was designed to evaluate functional outcome in patients with emergent large vessel occlusion (ELVO) presenting within 0-12 hours with pre-specified bifurcated arms of early and late window presentation, who were selected for endovascular thrombectomy with non-vendor specific commercially available perfusion imaging software. Recent trials demonstrating the benefit of thrombectomy up to 16-24 hours following ELVO removed equipoise to randomize late window ELVO patients and therefore the trial was halted. METHODS Up to 200 patients were to be enrolled in this FDA-cleared, prospective, randomized, multicenter international trial to compare thrombectomy and best medical management in patients with ELVO ineligible for or refractory to treatment with IV tissue plasminogen activator (IV-tPA) selected with perfusion imaging and presenting within 0-12 hours of last seen normal. The primary outcome was 90-day clinical outcome as measured by the raw modified Rankin Scale (mRS) with scores 5 and 6 collapsed (mRS shift analysis). RESULTS The POSITIVE trial suspended enrollment with the release of results from the DAWN trial and was stopped after the release of the DEFUSE 3 trial results. Thirty-three patients were enrolled (21 for medical management and 12 for thrombectomy). Twelve of the 33 patients were enrolled in the 6-12 hour cohort. Despite the early cessation, the primary outcome demonstrated statistically significant superior clinical outcomes for patients treated with thrombectomy (P=0.0060). The overall proportion of patients achieving an mRS score of 0-2 was 75% in the thrombectomy cohort and 43% in the medical management cohort (OR 4.00, 95% CI 0.84 to 19.2). CONCLUSION POSITIVE supports the already established practice of delayed thrombectomy for appropriately selected patients presenting within 0-12 hours selected by perfusion imaging from any vendor. The results of the POSITIVE trial are consistent with other thrombectomy trials. The statistically significant effect on functional improvement, despite the small number of patients, reinforces the robust benefits of thrombectomy. CLINICAL TRIAL REGISTRATION NCT01852201.
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Affiliation(s)
- J Mocco
- Neurosurgery, The Mount Sinai Hospital, New York, New York, USA
| | - Adnan H Siddiqui
- Neurosurgery and Radiology and Canon Stroke and Vascular Research Center, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, New York, USA.,Neurosurgery, Gates Vascular Institute, Buffalo, New York, USA
| | - David Fiorella
- Neurosurgery, Stony Brook University, Stony Brook, New York, USA.,SUNY SB, Stony Brook, New York, USA
| | | | - Adam S Arthur
- Semmes-Murphey Neurologic and Spine Institute, Memphis, Tennessee, USA.,Neurosurgery, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | | | | | - Michael T Froehler
- Cerebrovascular Program, Vanderbilt University, Nashville, Tennessee, USA
| | - Ricardo A Hanel
- Lyerly Neurosurgery, Baptist Medical Center Downtown, Jacksonville, Florida, USA
| | - Jonathan Lena
- Neurosciences, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Steven Persaud
- Neurosurgery, The Mount Sinai Hospital, New York, New York, USA
| | - Ajit S Puri
- Radiology, University of Massachusetts, Worcester, Massachusetts, USA
| | - Ansaar T Rai
- Neurointerventional Radiology, West Virginia University, Morgantown, West Virginia, USA
| | - Max Wintermark
- Radiology, University of Virginia, Charlottesville, Virginia, USA
| | - Keith Woodward
- Britton Woodward, Britton Woodward, Knoxville, Tennessee, USA
| | - Xiangnan Zhang
- Neurosurgery, The Mount Sinai Hospital, New York, New York, USA
| | - Aquilla Turk
- Neurosurgery, Prisma Health Upstate, Greenville, South Carolina, USA
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