Cited by 1,401Heart Rate Variability and Autonomic ControlVagus Nerve Stimulation ResearchNon-Invasive Vital Sign Monitoring

The LF/HF ratio does not accurately measure cardiac sympatho-vagal balance

Open access
Billman, George E.·2013·Frontiers in Physiology

Abstract

OPINION article Front. Physiol., 20 February 2013Sec. Clinical and Translational Physiology Volume 4 - 2013 | https://doi.org/10.3389/fphys.2013.00026

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.3389/fphys.2013.00026

Cites

65 of 65 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Sympathetic and parasympathetic activity are not reciprocal, but interact in a loosely coupled fashion.

    “It should be noted, though, that sympathetic and parasympathetic activity are not reciprocal, but interact in a loosely coupled fashion (e.g. Billman, 2013; de Geus et al., 2019).”

    From Trauma-related dissociation and the autonomic nervous system: a systematic literature review of psychophysiological correlates of dissociative experiencing in PTSD patients (2022) · cites this paper as Billman, 2013

    In the section on LF/HF and sympatho-vagal balance, Billman describes complex, non-linear interactions and examples where sympathetic and parasympathetic activity do not change reciprocally. But the paper also says small arterial-pressure changes typically provoke reciprocal changes, so the claim's unqualified statement that the activities 'are not reciprocal' overstates the source. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Under ordinary circumstances, decreases in high-frequency heart rate variability indicate decreased parasympathetic and increased sympathetic activation.

    “Under ordinary circumstances, HF decreases indicate decreased parasympathetic and increased sympathetic activation [36, 48, 49]”

    From The Influence of Buddhist Meditation Traditions on the Autonomic System and Attention (2015) · cites this paper as [36]

    In the paper’s main text (page not provided), Billman reports a strong association between HF power and cardiac parasympathetic activity, supporting the first part of the claim. But the paper does not establish that an HF decrease ordinarily indicates increased sympathetic activation; it cautions that sympathetic and parasympathetic activity do not always change reciprocally and that HF power has other influences. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • There is now a consensus that the precise physiological underpinning of the LF/HF ratio is unclear, thus lowering its predictive value.

    “Hence, there is now a consensus to say that the precise physiological underpinning is unclear, thus lowering its predictive value.”

    From Heart Rate Variability and Cardiac Vagal Tone in Psychophysiological Research – Recommendations for Experiment Planning, Data Analysis, and Data Reporting (2017) · cites this paper as Billman, 2013

    In the paper’s concluding discussion (page unavailable), Billman says the physiological basis of LF/HF cannot be determined with certainty and that the ratio cannot accurately quantify cardiac sympatho-vagal balance. The paper does not establish a consensus or assess the ratio’s predictive value; it also says the ratio remains widely accepted despite its limitations. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Billman, G. E.
Affiliations
The Ohio State University (US)
Corresponding author
Billman, George E.
Venue
Frontiers in Physiology
Published
2013
Volume
4
Pages
26-26
ISSN
1664-042X (ISSN-L)
OpenAlex
W2107161633
Cited by
1,401
References
65
Citations by year
2026: 177 · 2025: 140 · 2024: 122 · 2023: 123 · 2022: 134 · 2021: 130 · 2020: 115 · 2019: 107 · 2018: 121 · 2017: 98 · 2016: 54 · 2015: 36 · 2014: 29 · 2013: 14
FWCI
30.11
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Physiology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
  • Life Sciences › Neuroscience › Neurology › Vagus Nerve Stimulation Research
  • Physical Sciences › Engineering › Biomedical Engineering › Non-Invasive Vital Sign Monitoring
Keywords
LF/HF ratio, heart rate variability, autonomic nervous system

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review