Evidence map›Paper›PMID 27555757›Full record

ArticleInternational journal of chronic obstructive pulmonary disease2016

Respiratory muscle strength effect on linear and nonlinear heart rate variability parameters in COPD patients.

Cássia Da Luz Goulart, Julio Cristiano Simon, Paloma De Borba Schneiders, Elisabete Antunes San Martin, Ramona Cabiddu, Audrey Borghi-Silva, Renata Trimer, Andréa Lúcia Gonçalves da Silva

Abstract read
In one paragraph

Article in International journal of chronic obstructive pulmonary disease, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

18 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Influence of expiratory positive airway pressure on cardiac autonomic modulation at rest and in submaximal exercise in COPD patients.Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologica · 2018
    Trial
  3. Trial
  4. Heart rate variability metrics and myocardial recovery in heart failure with reduced ejection fraction.Clinical autonomic research : official journal of the Clinical Autonomic Research Society · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Complexity analysis of heart rate variability in chronic obstructive pulmonary disease: relationship with severity and symptoms.Clinical autonomic research : official journal of the Clinical Autonomic Research Society · 2020
    Article
  12. Article
  13. Article
  14. Article
  15. Impact of chronic obstructive pulmonary disease on linear and nonlinear dynamics of heart rate variability in patients with heart failure.Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologica · 2020
    Article
  16. Article
  17. Review
  18. Entropy change of biological dynamics in COPD.International journal of chronic obstructive pulmonary disease · 2017
    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

8 authors.

Cássia Da Luz GoulartCourse of Physiotherapy, Department of Health and Physical Education, University of Santa Cruz do Sul (UNISC), Santa Cruz do Sul, Rio Grande do Sul, Brazil.
Julio Cristiano SimonCourse of Physiotherapy, Department of Health and Physical Education, University of Santa Cruz do Sul (UNISC), Santa Cruz do Sul, Rio Grande do Sul, Brazil.
Paloma De Borba SchneidersCourse of Physiotherapy, Department of Health and Physical Education, University of Santa Cruz do Sul (UNISC), Santa Cruz do Sul, Rio Grande do Sul, Brazil.
Elisabete Antunes San MartinCourse of Physiotherapy, Department of Health and Physical Education, University of Santa Cruz do Sul (UNISC), Santa Cruz do Sul, Rio Grande do Sul, Brazil.
Ramona CabidduCardiopulmonary Physiotherapy Laboratory, Nucleus of Research in Physical Exercise, Federal University of São Carlos (UFSCar), São Carlos, São Paulo, Brazil.
Audrey Borghi-SilvaCardiopulmonary Physiotherapy Laboratory, Nucleus of Research in Physical Exercise, Federal University of São Carlos (UFSCar), São Carlos, São Paulo, Brazil.
Renata TrimerCardiopulmonary Physiotherapy Laboratory, Nucleus of Research in Physical Exercise, Federal University of São Carlos (UFSCar), São Carlos, São Paulo, Brazil.
Andréa Lúcia Gonçalves da SilvaCourse of Physiotherapy, Department of Health and Physical Education, University of Santa Cruz do Sul (UNISC), Santa Cruz do Sul, Rio Grande do Sul, Brazil.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionChronic obstructive pulmonary disease (COPD) is recognized as a multisystemic inflammatory disease associated with extrapulmonary comorbidities, including respiratory muscle weakness and cardiovascular and cardiac autonomic regulation disorders. We investigated whether alterations in respiratory muscle strength (RMS) would affect cardiac autonomic modulation in COPD patients.

methodsThis study was a cross-sectional study done in ten COPD patients affected by moderate to very severe disease. The heart rate variability (HRV) signal was recorded using a Polar cardiofrequencimeter at rest in the sitting position (10 minutes) and during a respiratory sinus arrhythmia maneuver (RSA-M; 4 minutes). Linear analysis in the time and frequency domains and nonlinear analysis were performed on the recorded signals. RMS was assessed using a digital manometer, which provided the maximum inspiratory pressure (PImax) and the maximum expiratory pressure (PEmax).

resultsDuring the RSA-M, patients presented an HRV power increase in the low-frequency band (LFnu) (46.9±23.7 vs 75.8±27.2; P=0.01) and a decrease in the high-frequency band (HFnu) (52.8±23.5 vs 24.0±27.0; P=0.01) when compared to the resting condition. Significant associations were found between RMS and HRV spectral indices: PImax and LFnu (r=-0.74; P=0.01); PImax and HFnu (r=0.74; P=0.01); PEmax and LFnu (r=-0.66; P=0.01); PEmax and HFnu (r=0.66; P=0.03); between PEmax and sample entropy (r=0.83; P<0.01) and between PEmax and approximate entropy (r=0.74; P=0.01). Using a linear regression model, we found that PImax explained 44% of LFnu behavior during the RSA-M.

conclusionCOPD patients with impaired RMS presented altered cardiac autonomic control, characterized by marked sympathetic modulation and a reduced parasympathetic response; reduced HRV complexity was observed during the RSA-M.

Indexed as

Heart RateMuscle StrengthAgedAutonomic Nervous SystemExhalationFemaleHeartHumansInhalationLinear ModelsLungMaleManometryMiddle AgedNonlinear DynamicsPredictive Value of Testsautonomic nervous systemCOPDheart ratemuscle strengthsinus arrhythmia

Identifiers

PMID27555757
PMCPMC4968685

What OpenQuestion holds

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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.