Evidence map›Paper›PMID 29996123›Full record

ArticleCerebrovascular diseases extra2018

Cerebral Haemodynamics following Acute Ischaemic Stroke: Effects of Stroke Severity and Stroke Subtype.

Osian Llwyd, Angela S M Salinet, Ronney B Panerai, Man Y Lam, Nazia P Saeed, Fiona Brodie, Edson Bor-Seng-Shu, Thompson G Robinson, Ricardo C Nogueira

Abstract readComparative StudyMulticenter Study
In one paragraph

Article in Cerebrovascular diseases extra, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Assessment of cerebral autoregulation in stroke: A systematic review and meta-analysis of studies at rest.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2019
    Pooled it
  2. Transcranial ultrasound with electrical stimulation of the cerebello-parietal nucleus on cerebral blood flow and limb function in patients with stroke.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Trial
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  10. Review of studies on dynamic cerebral autoregulation in the acute phase of stroke and the relationship with clinical outcome.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2022
    Review
  11. Integrative physiological assessment of cerebral hemodynamics and metabolism in acute ischemic stroke.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2022
    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

9 authors.

Osian LlwydDepartment of Cardiovascular Sciences Cerebral Haemodynamics in Ageing and Stroke Medicine Research Group, University of Leicester, Leicester, United Kingdom.
Angela S M SalinetDepartment of Cardiovascular Sciences Cerebral Haemodynamics in Ageing and Stroke Medicine Research Group, University of Leicester, Leicester, United Kingdom.
Ronney B PaneraiDepartment of Cardiovascular Sciences Cerebral Haemodynamics in Ageing and Stroke Medicine Research Group, University of Leicester, Leicester, United Kingdom.
Man Y LamDepartment of Cardiovascular Sciences Cerebral Haemodynamics in Ageing and Stroke Medicine Research Group, University of Leicester, Leicester, United Kingdom.
Nazia P SaeedDepartment of Cardiovascular Sciences Cerebral Haemodynamics in Ageing and Stroke Medicine Research Group, University of Leicester, Leicester, United Kingdom.
Fiona BrodieDepartment of Cardiovascular Sciences Cerebral Haemodynamics in Ageing and Stroke Medicine Research Group, University of Leicester, Leicester, United Kingdom.
Edson Bor-Seng-ShuNeurology Department, Hospital das Clinicas, School of Medicine, University of São Paulo, São Paulo, Brazil.
Thompson G RobinsonDepartment of Cardiovascular Sciences Cerebral Haemodynamics in Ageing and Stroke Medicine Research Group, University of Leicester, Leicester, United Kingdom.
Ricardo C NogueiraNeurology Department, Hospital das Clinicas, School of Medicine, University of São Paulo, São Paulo, Brazil.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAcute ischaemic stroke (AIS) patients often show impaired cerebral autoregulation (CA). We tested the hypothesis that CA impairment and other alterations in cerebral haemodynamics are associated with stroke subtype and severity.

methodsAIS patients (n = 143) were amalgamated from similar studies. Data from baseline (< 48 h stroke onset) physiological recordings (beat-to-beat blood pressure [BP], cerebral blood flow velocity (CBFV) from bilateral insonation of the middle cerebral arteries) were calculated for mean values and autoregulation index (ARI). Differences were assessed between stroke subtype (Oxfordshire Community Stroke Project [OCSP] classification) and severity (National Institutes of Health Stroke Scale [NIHSS] score < 5 and 5-25). Correlation coefficients assessed associations between NIHSS and physiological measurements.

resultsThirty-two percent of AIS patients had impaired CA (ARI < 4) in affected hemisphere (AH) that was similar between stroke subtypes and severity. CBFV in AH was comparable between stroke subtype and severity. In unaffected hemisphere (UH), differences existed in mean CBFV between lacunar and total anterior circulation OCSP subtypes (42 vs. 56 cm•s-1, p < 0.01), and mild and moderate-to-severe stroke severity (45 vs. 51 cm•s-1, p = 0.04). NIHSS was associated with peripheral (diastolic and mean arterial BP) and cerebral haemodynamic parameters (CBFV and ARI) in the UH.

conclusionsAIS patients with different OCSP subtypes and severity have homogeneity in CA capability. Cerebral haemodynamic measurements in the UH were distinguishable between stroke subtype and severity, including the association between deteriorating ARI in UH with stroke severity. More studies are needed to determine their clinical significance and to understand the determinants of CA impairment in AIS patients.

Indexed as

Cerebrovascular CirculationHemodynamicsAgedArterial PressureBlood Flow VelocityBrain IschemiaBrazilDisability EvaluationEnglandFemaleHumansMaleMiddle AgedMiddle Cerebral ArteryPrognosisSeverity of Illness IndexAcute strokeBlood flow velocityCerebral autoregulationStroke severityStroke subtype

Identifiers

PMID29996123
PMCPMC6489023

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.