Evidence map›Paper›PMID 30671784›Full record

SynthesisNeurocritical care2020

Delayed Cerebral Ischemia After Subarachnoid Hemorrhage: Experimental-Clinical Disconnect and the Unmet Need.

Fumiaki Oka, David Y Chung, Michiyasu Suzuki, Cenk Ayata

Open access · greenAbstract readSystematic Review
In one paragraph

Synthesis in Neurocritical care, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 3 pooled it
3.9field-weighted citation impact, top 6% 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

26 citing papers in PubMed, 3 syntheses or guidelines pooled it, 39 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
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  7. Review
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  12. Article
  13. Role of microglia after subarachnoid hemorrhage.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2024
    Review
  14. Article
  15. Article
  16. Article
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  19. Subarachnoid hemorrhage leads to early and persistent functional connectivity and behavioral changes in mice.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2021
    Article
  20. Aneurysmal Subarachnoid Hemorrhage.Neurologic clinics · 2021
    Review
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

4 authors at 3 institutions in 2 countries.

Fumiaki OkaNeurovascular Research Lab, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA. oka6617@yamaguchi-u.ac.jp.
David Y ChungNeurovascular Research Lab, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.
Michiyasu SuzukiDepartment of Neurosurgery, Yamaguchi University School of Medicine, 1-1-1, Minami-Kogushi, Ube, Yamaguchi, 755-8505, Japan.
Cenk AyataNeurovascular Research Lab, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.
Massachusetts General Hospital · USHarvard University · USYamaguchi University · JP

Funding

Targeting ROCK for Neurogliovascular Plasticity & Remodeling After StrokeP01NS055104 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI LO, ENG H. · 2007 to 2018
$13.3M
Neuroscience Resident Research ProgramR25NS065743 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI CASH, SYDNEY S, WILLIAMS, ZIV · 2009 to 2023
$11.8M
Institutional Career Development CoreKL2TR002542 · NCATS · HARVARD MEDICAL SCHOOL · PI BREDELLA, MIRIAM ANTOINETTE, RUTKOVE, SEWARD B. · 2018 to 2022
$8.7M
Non-invasive vagus nerve stimulation targeting cortical spreading depression in migrane prophylaxisR01NS102969 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI AYATA, CENK · 2017 to 2021
$1.9M
Determinants of Functional Brain Connectivity After Subarachnoid HemorrhageK08NS112601 · NINDS · MASSACHUSETTS GENERAL HOSPITAL · PI CHUNG, DAVID YOUNG · 2019 to 2023
$1.0M
NCATS NIH HHS KL2 TR002542NINDS NIH HHS K08 NS112601NINDS NIH HHS P01 NS055104NINDS NIH HHS P01NS055104NINDS NIH HHS R01 NS102969NINDS NIH HHS R01NS102969NINDS NIH HHS R25 NS065743NINDS NIH HHS R25NS065743
6 · The paper itself

Abstract

backgroundDelayed cerebral ischemia (DCI) is among the most dreaded complications following aneurysmal subarachnoid hemorrhage (SAH). Despite advances in neurocritical care, DCI remains a significant cause of morbidity and mortality, prolonged intensive care unit and hospital stay, and high healthcare costs. Large artery vasospasm has classically been thought to lead to DCI. However, recent failure of clinical trials targeting vasospasm to improve outcomes has underscored the disconnect between large artery vasospasm and DCI. Therefore, interest has shifted onto other potential mechanisms such as microvascular dysfunction and spreading depolarizations. Animal models can be instrumental in dissecting pathophysiology, but clinical relevance can be difficult to establish.

methodsHere, we performed a systematic review of the literature on animal models of SAH, focusing specifically on DCI and neurological deficits.

resultsWe find that dog, rabbit and rodent models do not consistently lead to DCI, although some degree of delayed vascular dysfunction is common. Primate models reliably recapitulate delayed neurological deficits and ischemic brain injury; however, ethical issues and cost limit their translational utility.

conclusionsTo facilitate translation, clinically relevant animal models that reproduce the pathophysiology and cardinal features of DCI after SAH are urgently needed.

Indexed as

Disease Models, AnimalAnimalsBrain IschemiaDogsInjectionsMiceRabbitsRatsSubarachnoid HemorrhageVasospasm, IntracranialAnimal modelsDelayed cerebral ischemiaSubarachnoid hemorrhage

Identifiers

PMID30671784
PMCPMC7387950
OpenAlexW2914288448

What OpenQuestion holds

Textmetadata
LicenceTDM
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.