Evidence map›Paper›PMID 28959484›Full record

ArticleStroke and vascular neurology2017

Determinants of the impact of blood pressure variability on neurological outcome after acute ischaemic stroke.

Adam de Havenon, Alicia Bennett, Gregory J Stoddard, Gordon Smith, Lee Chung, Steve O'Donnell, J Scott McNally, David Tirschwell, Jennifer J Majersik

Abstract read
In one paragraph

Article in Stroke and vascular neurology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing 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

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

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  19. An update on hyper-acute management of ischaemic stroke.Clinical medicine (London, England) · 2021
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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.

Adam de HavenonDepartment of Neurology, University of Utah, Salt Lake City, Utah, USA.ORCID 0000-0001-8178-8597
Alicia BennettUniversity of Utah, Salt Lake City, Utah, USA.
Gregory J StoddardUniversity of Utah, Salt Lake City, Utah, USA.
Gordon SmithUniversity of Utah, Salt Lake City, Utah, USA.
Lee ChungUniversity of Utah, Salt Lake City, Utah, USA.
Steve O'DonnellUniversity of Utah, Salt Lake City, Utah, USA.
J Scott McNallyUniversity of Utah, Salt Lake City, Utah, USA.
David TirschwellUniversity of Washington, Seattle, Washington, USA.
Jennifer J MajersikUniversity of Utah, Salt Lake City, Utah, USA.

Funding

University of Utah Center for clinical and Translational ScienceKL2TR001065 · NCATS · UNIVERSITY OF UTAH · PI DERE, WILLARD H., HESS, RACHEL · 2013 to 2017
$1.1M
NCATS NIH HHS KL2 TR001065
6 · The paper itself

Abstract

introductionIncreased blood pressure variability (BPV) is detrimental after acute ischaemic stroke, but the interaction between BPV and neuroimaging factors that directly influence stroke outcome has not been explored.

methodsWe retrospectively reviewed inpatients from 2007 to 2014 with acute anterior circulation ischaemic stroke, CT perfusion and angiography at hospital admission, and a modified Rankin Scale (mRS) 30-365 days after stroke onset. BPV indices included SD, coefficient of variation and successive variation of the systolic blood pressure between 0 and 120 hours after admission. Ordinal logistic regression models were fitted to mRS with predictor variables of BPV indices. Models were further stratified by CT perfusion volumetric measurements, proximal vessel occlusion and collateral score.

results110 patients met the inclusion criteria. The likelihood of a 1-point rise in the mRS increased with every 10 mm Hg increase in BPV (OR for the 3 BPV indices ranged from 2.27 to 5.54), which was more pronounced in patients with larger ischaemic core volumes (OR 8.37 to 18.0) and larger hypoperfused volumes (OR 6.02 to 15.4). This association also held true for patients with larger mismatch volume, proximal vessel occlusion and good collateral vessels.

conclusionsThese results indicate that increased BPV is associated with worse neurological outcome after stroke, particularly in patients with a large lesion core volume, concurrent viable ischaemic penumbra, proximal vessel occlusion and good collaterals. This subset of patients, who are often not candidates for or fail acute stroke therapies such as intravenous tissue plasminogen activator or endovascular thrombectomy, may benefit from interventions aimed at reducing BPV.

Indexed as

Blood PressureCerebrovascular CirculationCollateral CirculationNeuroimagingAdultAgedBlood Pressure DeterminationCerebral AngiographyComputed Tomography AngiographyDisability EvaluationFemaleHumansIschemic StrokeMaleMiddle AgedPatient AdmissionBlood PressureCT perfusionStroke

Identifiers

PMID28959484
PMCPMC5435214

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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.