Evidence map›Paper›PMID 34556475›Full record

ArticleAJNR. American journal of neuroradiology2021

Outcomes of Mechanical Thrombectomy in the Early (<6-hour) and Extended (≥6-hour) Time Window Based Solely on Noncontrast CT and CT Angiography: A Propensity Score-Matched Cohort Study.

P Hendrix, D Chaudhary, V Avula, V Abedi, R Zand, A Noto, I Melamed, O Goren, C M Schirmer, C J Griessenauer

Open access · bronzeAbstract read
In one paragraph

Article in AJNR. American journal of neuroradiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

15 citing papers in PubMed, 22 citations in OpenAlex.

  1. Article
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  3. 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
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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

10 authors at 4 institutions in 4 countries.

P HendrixFrom the Department of Neurosurgery (P.H., I.M., O.G., C.M.S., C.J.G.).ORCID 0000-0003-0017-5049
D ChaudharyDepartment of Neurology (D.C., R.Z., A.N.), Geisinger Neuroscience Institute.ORCID 0000-0002-2683-5482
V AvulaDepartment of Molecular and Functional Genomics (V. Avula, V. Abedi), Geisinger Health System, Danville, Pennsylvania.ORCID 0000-0001-5141-1502
V AbediDepartment of Molecular and Functional Genomics (V. Avula, V. Abedi), Geisinger Health System, Danville, Pennsylvania.ORCID 0000-0001-7689-933X
R ZandDepartment of Neurology (D.C., R.Z., A.N.), Geisinger Neuroscience Institute.ORCID 0000-0002-9477-0094
A NotoDepartment of Neurology (D.C., R.Z., A.N.), Geisinger Neuroscience Institute.ORCID 0000-0002-1624-7193
I MelamedFrom the Department of Neurosurgery (P.H., I.M., O.G., C.M.S., C.J.G.).ORCID 0000-0001-6705-9574
O GorenFrom the Department of Neurosurgery (P.H., I.M., O.G., C.M.S., C.J.G.).ORCID 0000-0001-8580-550X
C M SchirmerFrom the Department of Neurosurgery (P.H., I.M., O.G., C.M.S., C.J.G.).ORCID 0000-0003-1743-8781
C J GriessenauerFrom the Department of Neurosurgery (P.H., I.M., O.G., C.M.S., C.J.G.) christoph.griessenauer@gmail.com.ORCID 0000-0002-2952-3812
Mahindra and Mahindra Limited (India) · INGeisinger Neuroscience Institute · USGeisinger Health System · USParacelsus Medical University · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeCurrent stroke care recommendations for patient selection for mechanical thrombectomy in the extended time window demand advanced imaging to determine the stroke core volume and hypoperfusion mismatch, which may not be available at every center. We aimed to determine outcomes in patients selected for mechanical thrombectomy solely on the basis of noncontrast CT and CTA in the early (<6-hour) and extended (≥6-hour) time windows. MATERIALS AND

methodsConsecutive mechanical thrombectomies performed for acute large-vessel occlusion ischemic (ICA, M1, M2) stroke between February 2016 and August 2020 were retrospectively reviewed. Eligibility was based solely on demographics and noncontrast CT (ASPECTS) and CTA, due to the limited availability of perfusion imaging during the study period. Propensity score matching was performed to compare outcomes between time windows.

resultsOf 417 mechanical thrombectomies performed, 337 met the inclusion criteria, resulting in 205 (60.8%) and 132 (39.2%) patients in the 0- to 6- and 6- to 24-hour time windows, respectively. The ASPECTS was higher in the early time window (9; interquartile range = 8-10) than the extended time window (9; interquartile range = 7-10;

conclusionsPatients selected for mechanical thrombectomy in the extended time window solely on the basis of noncontrast CT and CTA still achieved decent rates of favorable 90-day functional outcomes, not statistically different from patients in the early time window.

Indexed as

Brain IschemiaStrokeCohort StudiesComputed Tomography AngiographyHumansPropensity ScoreRetrospective StudiesThrombectomyTreatment Outcome

Identifiers

PMID34556475
PMCPMC8583277
OpenAlexW3199770894

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.