Evidence map›Paper›PMID 32588184›Full record

ArticleJournal of neurology2020

Relationship between stroke etiology and collateral status in anterior circulation large vessel occlusion.

Eva Hassler, Markus Kneihsl, Hannes Deutschmann, Nicole Hinteregger, Marton Magyar, Ulrike Wießpeiner, Melanie Haidegger, Simon Fandler-Höfler, Sebastian Eppinger, Kurt Niederkorn and 3 more

Abstract read
In one paragraph

Article in Journal of neurology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

16 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Under (back) pressure: Better collateral flow may facilitate clot removal in ischemic stroke: A systematic review and meta-analysis.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2026
    Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. Efficacy of intravenous thrombolysis in patients with mild acute ischemic stroke and large vessel occlusion with different hypoperfusion volumes.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Article
  6. Article
  7. Observational
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
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

13 authors.

Eva HasslerDivision of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology, Medical University of Graz, Graz, Austria.
Markus KneihslDepartment of Neurology, Medical University of Graz, Auenbruggerplatz 22, 8036, Graz, Austria.
Hannes DeutschmannDivision of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology, Medical University of Graz, Graz, Austria.
Nicole HintereggerDivision of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology, Medical University of Graz, Graz, Austria.
Marton MagyarDivision of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology, Medical University of Graz, Graz, Austria.
Ulrike WießpeinerDivision of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology, Medical University of Graz, Graz, Austria.
Melanie HaideggerDepartment of Neurology, Medical University of Graz, Auenbruggerplatz 22, 8036, Graz, Austria.
Simon Fandler-HöflerDepartment of Neurology, Medical University of Graz, Auenbruggerplatz 22, 8036, Graz, Austria.
Sebastian EppingerDepartment of Neurology, Medical University of Graz, Auenbruggerplatz 22, 8036, Graz, Austria.
Kurt NiederkornDepartment of Neurology, Medical University of Graz, Auenbruggerplatz 22, 8036, Graz, Austria.
Christian EnzingerDivision of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology, Medical University of Graz, Graz, Austria.
Franz FazekasDepartment of Neurology, Medical University of Graz, Auenbruggerplatz 22, 8036, Graz, Austria.
Thomas GattringerDivision of Neuroradiology, Vascular and Interventional Radiology, Department of Radiology, Medical University of Graz, Graz, Austria. thomas.gattringer@medunigraz.at.ORCID http://orcid.org/0000-0002-6065-6576

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeClinical outcome after mechanical thrombectomy (MT) for large vessel occlusion (LVO) stroke is influenced by the intracerebral collateral status. We tested the hypothesis that patients with preexisting ipsilateral extracranial carotid artery stenosis (CAS) would have a better collateral status compared to non-CAS patients. Additionally, we evaluated MT-related adverse events and outcome for both groups.

methodsOver a 7-year period, we identified all consecutive anterior circulation MT patients (excluding extracranial carotid artery occlusion and dissection). Patients were grouped into those with CAS ≥ 50% according to the NASCET criteria and those without significant carotid stenosis (non-CAS). Collateral status was rated on pre-treatment CT- or MR-angiography according to the Tan Score. Furthermore, we assessed postinterventional infarct size, adverse events and functional outcome at 90 days.

resultsWe studied 281 LVO stroke patients, comprising 46 (16.4%) with underlying CAS ≥ 50%. Compared to non-CAS stroke patients (n = 235), patients with CAS-related stroke more often had favorable collaterals (76.1% vs. 46.0%). Recanalization rates were comparable between both groups. LVO stroke patients with underlying CAS more frequently had adverse events after MT (19.6% vs. 6.4%). Preexisting CAS was an independent predictor for favorable collateral status in multivariable models (Odds ratio: 3.3, p = 0.002), but post-interventional infarct size and functional 90-day outcome were not different between CAS and non-CAS patients.

conclusionsPreexisting CAS ≥ 50% was associated with better collateral status in LVO stroke patients. However, functional 90-day outcome was independent from CAS, which could be related to a higher rate of adverse events.

Indexed as

Carotid StenosisStrokeCerebrovascular CirculationHumansRetrospective StudiesThrombectomyTreatment OutcomeCarotid artery diseasesCollateral circulationOutcomeStrokeThrombectomy

Identifiers

PMID32588184
PMCPMC7578156

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.