Evidence map›Paper›PMID 37968647›Full record

ArticleJournal of translational medicine2023

Dysautonomia and small fiber neuropathy in post-COVID condition and Chronic Fatigue Syndrome.

N Azcue, R Del Pino, M Acera, T Fernández-Valle, N Ayo-Mentxakatorre, T Pérez-Concha, A Murueta-Goyena, J V Lafuente, A Prada, A López de Munain and 6 more

Open access · goldAbstract read
In one paragraph

Article in Journal of translational medicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
7.3field-weighted citation impact, top 2% 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

27 citing papers in PubMed, 33 citations in OpenAlex.

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  14. Neuroimmune pathophysiology of long COVID.Psychiatry and clinical neurosciences · 2025
    Review
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  17. Oral SARS-CoV-2 Infection and Risk for Long Covid.Reviews in medical virology · 2025
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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

16 authors at 6 institutions in 1 country.

N AzcueNeurodegenerative Diseases Group, Biocruces Bizkaia Health Research Institute, Plaza de Cruces 12, 48903, Barakaldo (Bizkaia), CP, Spain.
R Del PinoNeurodegenerative Diseases Group, Biocruces Bizkaia Health Research Institute, Plaza de Cruces 12, 48903, Barakaldo (Bizkaia), CP, Spain. delpinorocio@gmail.com.ORCID 0000-0002-6612-4757
M AceraNeurodegenerative Diseases Group, Biocruces Bizkaia Health Research Institute, Plaza de Cruces 12, 48903, Barakaldo (Bizkaia), CP, Spain.
T Fernández-ValleNeurodegenerative Diseases Group, Biocruces Bizkaia Health Research Institute, Plaza de Cruces 12, 48903, Barakaldo (Bizkaia), CP, Spain.
N Ayo-MentxakatorreNeurodegenerative Diseases Group, Biocruces Bizkaia Health Research Institute, Plaza de Cruces 12, 48903, Barakaldo (Bizkaia), CP, Spain.
T Pérez-ConchaDepartment of Neurology, Cruces University Hospital-OSAKIDETZA, Barakaldo, Spain.
A Murueta-GoyenaNeurodegenerative Diseases Group, Biocruces Bizkaia Health Research Institute, Plaza de Cruces 12, 48903, Barakaldo (Bizkaia), CP, Spain.
J V LafuenteDepartment of Neurosciences, University of the Basque Country UPV/EHU, Leioa, Spain.
A PradaDepartment of Immunology, Donostia University Hospital-OSAKIDETZA, San Sebastián, Spain.
A López de MunainDepartment of Neurology, Donostia University Hospital-OSAKIDETZA, San Sebastián, Spain.
G Ruiz IrastorzaAutoimmune Diseases Research Unit, Biocruces Bizkaia Health Research Institute, Barakaldo, Spain.
D Martín-IglesiasAutoimmune Diseases Research Unit, Biocruces Bizkaia Health Research Institute, Barakaldo, Spain.
L RibacobaDepartment of Internal Medicine, Cruces University Hospital, Barakaldo, Spain.
I GabilondoNeurodegenerative Diseases Group, Biocruces Bizkaia Health Research Institute, Plaza de Cruces 12, 48903, Barakaldo (Bizkaia), CP, Spain.
J C Gómez-EstebanNeurodegenerative Diseases Group, Biocruces Bizkaia Health Research Institute, Plaza de Cruces 12, 48903, Barakaldo (Bizkaia), CP, Spain. juancarlosgomezesteban@gmail.com.
B Tijero-MerinoNeurodegenerative Diseases Group, Biocruces Bizkaia Health Research Institute, Plaza de Cruces 12, 48903, Barakaldo (Bizkaia), CP, Spain.
BioCruces Health research Institute · ESUniversidad de Deusto · ESUniversity of the Basque Country · ESHospital de Cruces · ESIkerbasque · ESSpanish Multiple Sclerosis Network · ES

Funding

Basque Government 2021111006EITB maratoia BIOS21/COV/006Hezkuntza, Hizkuntza Politika Eta Kultura Saila, Eusko Jaurlaritza PRE_2022_2_0111Instituto de Salud Carlos III PI20/01076
6 · The paper itself

Abstract

backgroundMyalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) and post-COVID condition can present similarities such as fatigue, brain fog, autonomic and neuropathic symptoms.

methodsThe study included 87 patients with post-COVID condition, 50 patients with ME/CFS, and 50 healthy controls (HC). The hemodynamic autonomic function was evaluated using the deep breathing technique, Valsalva maneuver, and Tilt test. The presence of autonomic and sensory small fiber neuropathy (SFN) was assessed with the Sudoscan and with heat and cold evoked potentials, respectively. Finally, a complete neuropsychological evaluation was performed. The objective of this study was to analyze and compare the autonomic and neuropathic symptoms in post-COVID condition with ME/CFS, and HC, as well as, analyze the relationship of these symptoms with cognition and fatigue.

resultsStatistically significant differences were found between groups in heart rate using the Kruskal-Wallis test (H), with ME/CFS group presenting the highest (H = 18.3; p ≤ .001). The Postural Orthostatic Tachycardia Syndrome (POTS), and pathological values in palms on the Sudoscan were found in 31% and 34% of ME/CFS, and 13.8% and 19.5% of post-COVID patients, respectively. Concerning evoked potentials, statistically significant differences were found in response latency to heat stimuli between groups (H = 23.6; p ≤ .01). Latency was highest in ME/CFS, and lowest in HC. Regarding cognition, lower parasympathetic activation was associated with worse cognitive performance.

conclusionsBoth syndromes were characterized by inappropriate tachycardia at rest, with a high percentage of patients with POTS. The prolonged latencies for heat stimuli suggested damage to unmyelinated fibers. The higher proportion of patients with pathological results for upper extremities on the Sudoscan suggested a non-length-dependent SFN.

Indexed as

COVID-19Fatigue Syndrome, ChronicPostural Orthostatic Tachycardia SyndromeSmall Fiber NeuropathyHumansPost-Acute COVID-19 SyndromeCognitionDysautonomiaMyalgic Encephalomyelitis/Chronic Fatigue SyndromePost-COVID conditionSmall fiber neuropathy

Identifiers

PMID37968647
PMCPMC10648633
OpenAlexW4388705440

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.