Evidence map›Paper›PMID 32877241›Full record

ArticleAmerican journal of physiology. Regulatory, integrative and comparative physiology2020

Parasympathetic activity is the key regulator of heart rate variability between decelerations during brief repeated umbilical cord occlusions in fetal sheep.

Christopher A Lear, Jenny A Westgate, Michi Kasai, Michael J Beacom, Yoshiki Maeda, Shoichi Magawa, Etsuko Miyagi, Tomoaki Ikeda, Laura Bennet, Alistair J Gunn

Open access · bronzeAbstract read
PubMed Publisher
In one paragraph

Article in American journal of physiology. Regulatory, integrative and comparative physiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
6.5field-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

12 citing papers in PubMed, 27 citations in OpenAlex.

  1. Fetal Cardiac Function in Early Labour and Intrapartum Outcomes: A Prospective Observational Study.BJOG : an international journal of obstetrics and gynaecology · 2026
    Observational
  2. Article
  3. Article
  4. Increased variability of fetal heart rate during labour: a review of preclinical and clinical studies.BJOG : an international journal of obstetrics and gynaecology · 2022
    Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Reply to Smolich and Mynard.American journal of physiology. Regulatory, integrative and comparative physiology · 2021
    Article
  11. Measurement of fetal parasympathetic activity during labor: a new pathway for evaluation of fetal well-being?American journal of physiology. Regulatory, integrative and comparative physiology · 2021
    Article
  12. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 3 institutions in 2 countries.

Christopher A LearFetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.ORCID 0000-0002-8937-0846
Jenny A WestgateFetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.
Michi KasaiFetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.
Michael J BeacomFetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.
Yoshiki MaedaFetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.
Shoichi MagawaFetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.
Etsuko MiyagiDepartment of Obstetrics and Gynecology, Yokohama City University, Yokohama, Japan.ORCID 0000-0002-5492-0844
Tomoaki IkedaDepartment of Obstetrics and Gynecology, Mie University, Mie, Japan.
Laura BennetFetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.
Alistair J GunnFetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.ORCID 0000-0003-0656-7035
University of Auckland · NZMie University · JPYokohama City University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fetal heart rate variability (FHRV) is a widely used index of intrapartum well being. Both arms of the autonomic system regulate FHRV under normoxic conditions in the antenatal period. However, autonomic control of FHRV during labor when the fetus is exposed to repeated, brief hypoxemia during uterine contractions is poorly understood. We have previously shown that the sympathetic nervous system (SNS) does not regulate FHRV during labor-like hypoxia. We therefore investigated the hypothesis that the parasympathetic system is the main mediator of intrapartum FHRV. Twenty-six chronically instrumented fetal sheep at 0.85 of gestation received either bilateral cervical vagotomy (

Indexed as

Heart Rate, FetalSheepAnimalsDecelerationFemaleFetal HypoxiaParasympathetic Nervous SystemPregnancyUmbilical Cordfetusheart rate variabilityhypoxemiaintrapartum decelerationslabor

Identifiers

PMID32877241
OpenAlexW3082201722

What OpenQuestion holds

Textmetadata
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.