Evidence map›Paper›PMID 31806593›Full record

Observational studyAJNR. American journal of neuroradiology2020

Imaging Triage of Patients with Late-Window (6-24 Hours) Acute Ischemic Stroke: A Comparative Study Using Multiphase CT Angiography versus CT Perfusion.

M A Almekhlafi, W G Kunz, R A McTaggart, M V Jayaraman, M Najm, S H Ahn, E Fainardi, M Rubiera, A V Khaw, A Zini and 4 more

Open access · bronzeAbstract readComparative StudyObservational Study
In one paragraph

Observational study in AJNR. American journal of neuroradiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.9field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 40 citations in OpenAlex.

  1. Trial
  2. Visual Alberta stroke program early computed tomography score versus RAPID-AI perfusion in predicting outcome after late-window thrombectomy.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  3. Optimization of collateral grading on computer tomography angiography.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
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  19. [Border areas of thrombectomy].Der Nervenarzt · 2021
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors at 8 institutions in 7 countries.

M A AlmekhlafiFrom the Department of Clinical Neurosciences (M.A.A., M.N., M.D.H., A.M.D., M.G., B.K.M.).ORCID 0000-0001-9550-8197
W G KunzDepartment of Radiology (W.G.K.), University Hospital, Ludwig Maximilian University of Munich, Munich, Germany.ORCID 0000-0002-5021-1952
R A McTaggartDepartments of Neurology, Diagnostic Imaging, and Neurosurgery (R.A.M., M.V.J.), Warren Alpert Medical School of Brown University, Providence, Rhode Island.ORCID 0000-0001-5853-5161
M V JayaramanDepartments of Neurology, Diagnostic Imaging, and Neurosurgery (R.A.M., M.V.J.), Warren Alpert Medical School of Brown University, Providence, Rhode Island.ORCID 0000-0002-4588-5135
M NajmFrom the Department of Clinical Neurosciences (M.A.A., M.N., M.D.H., A.M.D., M.G., B.K.M.).ORCID 0000-0003-3074-4791
S H AhnDepartment of Neurology (S.H.A.), Chosun University School of Medicine, Gwang Ju, South Korea.ORCID 0000-0002-4778-491X
E FainardiDepartment of Neurosciences and Rehabilitation (E.F.), University Hospital, Ferrara, Italy.ORCID 0000-0003-0477-724X
M RubieraDepartment of Neurology (M.R.), Hospital Vall d'Hebron, Passeig de la Vall d'Hebron, Barcelona, Spain.ORCID 0000-0001-8100-9477
A V KhawDepartment of Clinical Neurosciences (A.V.K.), University of Western Ontario, London, Ontario, Canada.ORCID 0000-0003-2173-5308
A ZiniDepartment of Neurology and Stroke Center (A.Z.), Istituto Di Ricovero e Cura a Carattere Scientifico Istituto di Scienze Neurologiche di Bologna, Maggiore Hospital, Bologna, Italy.ORCID 0000-0003-1486-4507
M D HillFrom the Department of Clinical Neurosciences (M.A.A., M.N., M.D.H., A.M.D., M.G., B.K.M.).ORCID 0000-0002-6269-1543
A M DemchukFrom the Department of Clinical Neurosciences (M.A.A., M.N., M.D.H., A.M.D., M.G., B.K.M.).ORCID 0000-0002-4930-7789
M GoyalFrom the Department of Clinical Neurosciences (M.A.A., M.N., M.D.H., A.M.D., M.G., B.K.M.).ORCID 0000-0001-9060-2109
B K MenonFrom the Department of Clinical Neurosciences (M.A.A., M.N., M.D.H., A.M.D., M.G., B.K.M.) docbijoymenon@gmail.com.ORCID 0000-0002-3466-496X
MACOM (United States) · USBrown University · USChosun University · KRHebron University · PSIstituto delle Scienze Neurologiche di Bologna · ITLudwig-Maximilians-Universität München · DEUniversity of Ferrara · ITWestern University · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeThe role of collateral imaging in selecting patients for endovascular thrombectomy beyond 6 hours from onset has not been established. To assess the comparative utility of collateral imaging using multiphase CTA in selecting late window patients for EVT. MATERIALS AND

methodsWe used data from a prospective multicenter observational study in which all patients underwent imaging with multiphase CT angiography as well as CTP. Two blinded reviewers evaluated patients' eligibility for endovascular thrombectomy using published collateral imaging (multiphase CTA) criteria compared with CTP using the selection criteria of the Clinical Mismatch in the Triage of Wake Up and Late Presenting Strokes Undergoing Neurointervention with Trevo (DAWN) and Endovascular Therapy Following Imaging Evaluation for Ischemic Stroke 3 (DEFUSE-3) trials. CTP images were processed using automated commercial software. The outcomes of patients eligible for endovascular thrombectomy according to multiphase CTA, DAWN, or DEFUSE-3 criteria were compared using multivariable logistic regression modeling. Model characteristics were compared using the C-statistic for the receiver operating characteristic curve, the Akaike information criterion, and the Bayesian information criterion.

resultsEighty-six patients presented beyond 6 hours from onset/last known well (median, 9.6 hours; interquartile range, 4.1 hours). Thirty-five patients (40.7%) received endovascular thrombectomy, of whom good functional outcome (90-day mRS, 0-2) was achieved in 16/35 (47%). Collateral-based imaging paradigms significantly modified the treatment effect of endovascular thrombectomy on 90-day mRS 0-2 (

conclusionsThe collateral-based imaging paradigm using multiphase CTA compares well with CTP in selecting patients for endovascular thrombectomy in the late time window.

Indexed as

Patient SelectionTime-to-TreatmentAgedBrain IschemiaComputed Tomography AngiographyEndovascular ProceduresFemaleHumansMaleMiddle AgedProspective StudiesStrokeThrombectomyTomography, X-Ray ComputedTriage

Identifiers

PMID31806593
PMCPMC6975310
OpenAlexW2993206327

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.