Evidence map›Paper›PMID 31324176›Full record

SynthesisBMC pediatrics2019

Severity of hypoxic ischemic encephalopathy and heart rate variability in neonates: a systematic review.

Mads Andersen, Ted C K Andelius, Mette V Pedersen, Kasper J Kyng, Tine B Henriksen

Open access · goldAbstract readSystematic Review
In one paragraph

Synthesis in BMC pediatrics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 2 pooled it
6.9field-weighted citation impact, top 3% 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, 2 syntheses or guidelines pooled it, 39 citations in OpenAlex.

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  9. Cardiac biomarkers predict low right ventricle performance in neonatal encephalopathy.Journal of perinatology : official journal of the California Perinatal Association · 2025
    Observational
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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

5 authors at 1 institution in 1 country.

Mads AndersenDepartment of Pediatrics, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus, Denmark. Madsandersen101093@gmail.com.ORCID 0000-0002-9682-9272
Ted C K AndeliusDepartment of Pediatrics, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus, Denmark.ORCID 0000-0003-4438-4686
Mette V PedersenDepartment of Pediatrics, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus, Denmark.ORCID 0000-0003-1120-5370
Kasper J KyngDepartment of Pediatrics, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus, Denmark.ORCID 0000-0001-7940-1656
Tine B HenriksenDepartment of Pediatrics, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus, Denmark.ORCID 0000-0001-6933-8294
Aarhus University Hospital · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSeveral studies have investigated heart rate variability (HRV) as a biomarker for acute brain injury in hypoxic ischemic encephalopathy (HIE). However, the current evidence is heterogeneous and needs further reviewing to direct future studies. We aimed to systematically review whether HIE severity is associated with HRV.

methodsThis systematic review was conducted according to the preferred reporting items for systematic review and meta analyses (PRISMA). We included studies comparing neonates with severe or moderate HIE with neonates with mild or no HIE with respect to different HRV measures within 7 days of birth. Article selection and quality assessment was independently performed by two reviewers. Risk of bias and strength of evidence was evaluated by the Newcastle-Ottawa scale (NOS) and the Grading of Recommendations Assessment, Development and Evaluation (GRADE).

resultsWe screened 1187 studies. From these, four observational studies with 248 neonates were included. For all HRV measures, the strength of evidence was very low. Neonates with severe or moderate HIE showed a reduction in most HRV measures compared to neonates with mild or no HIE with a greater reduction in those with severe HIE.

conclusionsModerate and severe HIE was associated with a reduction in most HRV measures. Accordingly, HRV is a potential biomarker for HIE severity during the first week of life. However, the uncertainty calls for more studies.

Indexed as

BiasBiomarkersBirth WeightCohort StudiesFemaleGestational AgeHeart Conduction SystemHeart RateHumansHypoxia-Ischemia, BrainInfant, NewbornIntensive Care Units, NeonatalMaleObservational Studies as TopicSeverity of Illness IndexSex DistributionBiomarkersHeart rate variabilityHypoxic ischemic encephalopathyNeonatal encephalopathyNeonatology

Identifiers

PMID31324176
PMCPMC6639904
OpenAlexW2963353239

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.