Evidence map›Paper›PMID 22566982›Full record

ArticleCerebrovascular diseases extra

Lower hemoglobin correlates with larger stroke volumes in acute ischemic stroke.

W Taylor Kimberly, Ona Wu, E Murat Arsava, Priya Garg, Ruijun Ji, Mark Vangel, Aneesh B Singhal, Hakan Ay, A Gregory Sorensen

Open access · goldAbstract read
In one paragraph

Article in Cerebrovascular diseases extra. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 14% 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, 1 synthesis or guideline pooled it, 53 citations in OpenAlex.

  1. Pooled it
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  12. Review
  13. Reduced Ischemic Lesion Growth with Heparin in Acute Ischemic Stroke.Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association · 2019
    Article
  14. Towards stroke prediction using electronic health records.BMC medical informatics and decision making · 2018
    Article
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  17. 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 at 2 institutions in 1 country.

W Taylor KimberlyDepartment of Neurology, Massachusetts General Hospital, Boston, Mass., USA.
Ona Wu
E Murat Arsava
Priya Garg
Ruijun Ji
Mark Vangel
Aneesh B Singhal
Hakan Ay
A Gregory Sorensen
Neurology, Inc · USMassachusetts General Hospital · US

Funding

Specialized Programs of Translational Research in Acute Stroke at the PartnersP50NS051343 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI GREENBERG, STEVEN M · 2006 to 2013
$17.5M
The NINDS International Stroke Genetics Consortium StudyU01NS069208 · NINDS · UNIVERSITY OF MARYLAND BALTIMORE · PI KITTNER, STEVEN J · 2010 to 2013
$9.4M
MRI DIFFUSION/PERFUSION MISMATCH IN HUMAN ACUTE STROKER01NS038477 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI SORENSEN, A. GREGORY · 1999 to 2008
$6.1M
Normobaric Hyperoxia in Acute Ischemic StrokeR01NS051412 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI SINGHAL, ANEESH B · 2006 to 2010
$2.1M
Heart-Brain Interactions In Human Acute Ischemic StrokeR01NS059710 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI AY, HAKAN · 2009 to 2013
$1.9M
NINDS NIH HHS P50 NS051343NINDS NIH HHS R01 NS038477NINDS NIH HHS R01 NS051412NINDS NIH HHS R01 NS059710NINDS NIH HHS U01 NS069208
6 · The paper itself

Abstract

backgroundHemoglobin tetramers are the major oxygen-carrying molecules within the blood. We hypothesized that a lower hemoglobin level and its reduced oxygen-carrying capacity would associate with larger infarction in acute ischemic stroke patients.

methodsWe studied 135 consecutive patients with acute ischemic stroke and perfusion brain MRI. We explored the association of admission hemoglobin with initial infarct volumes on acute images and the volume of infarct expansion on follow-up images. Multivariable linear regression was performed to analyze the independent effect of hemoglobin on imaging outcomes.

resultsBivariate analyses showed a significant inverse correlation between hemoglobin and initial volume in diffusion-weighted imaging (r = -0.20, p = 0.02) and absolute infarct growth (r = -0.20, p = 0.02). Multivariable linear regression modeling revealed that hemoglobin remained independently predictive of larger infarct volumes acutely (p < 0.005) and with greater infarct expansion (p < 0.01) after adjusting for known covariates.

conclusionsHemoglobin level at the time of acute ischemic stroke associates with larger infarcts and increased infarct growth. Clarification of the mechanism of this effect may yield novel insights for therapy.

Indexed as

Acute ischemiaHemoglobinIschemiaStroke volume

Identifiers

PMID22566982
PMCPMC3343751
OpenAlexW2038563220

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.