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  1. Article ; Online: Assessment of short- and long-term functionality and quality of life in patients with post-acute COVID-19 syndrome.

    de Azevedo Vieira, João Eduardo / Mafort, Thiago Thomaz / Monnerat, Laura Braga / da Cal, Mariana Soares / Ghetti, Angelo Thomaz Abalada / Lopes, Agnaldo José

    Journal of back and musculoskeletal rehabilitation

    2023  Volume 36, Issue 3, Page(s) 541–550

    Abstract: Background: Although the number of new cases of coronavirus 2019 (COVID-19) has been drastically reduced worldwide, patients who demonstrate long-term symptoms need more attention from health systems, as these symptoms can negatively affect ... ...

    Abstract Background: Although the number of new cases of coronavirus 2019 (COVID-19) has been drastically reduced worldwide, patients who demonstrate long-term symptoms need more attention from health systems, as these symptoms can negatively affect functionality and quality of life.
    Objective: To evaluate muscle function and quality of life at 3, 6, 9 and 12 months in patients with post-acute COVID-19 syndrome and to assess their associations with general fatigue and lung function.
    Methods: This observational and longitudinal study evaluated patients with post-acute COVID-19 syndrome. Participants were subjected to the following evaluations: Short Form-36; handgrip strength; Functional Assessment of Chronic Illness Therapy-Fatigue scale; and spirometry.
    Results: Among the 350 participants who were evaluated in the third month, 74.6%, 61.4% and 45.4% reported general fatigue, dyspnoea and cough, respectively. In the comparisons between the third month and the sixth month, there were significant increases in Functional Assessment of Chronic Illness Therapy-Fatigue scale, pulmonary function and several Short Form-36 domains. In the comparisons between the sixth month and the ninth month, there was a significant increase only in the social functioning domain of the Short Form-36. In the comparisons between the ninth month and the twelfth month, there was an increase only in some Short Form-36 domains. Significant correlations were observed between the Short Form-36 domains with Functional Assessment of Chronic Illness Therapy-Fatigue scale, handgrip strength and pulmonary function.
    Conclusion: In patients with post-acute COVID-19 syndrome, there was a progressive improvement in quality of life, general fatigue and pulmonary function during the 12 months of follow-up, with this improvement being more pronounced in the first 6 months. There was a relationship between functionality and quality of life in these patients.
    MeSH term(s) Humans ; Quality of Life ; Hand Strength ; Longitudinal Studies ; Post-Acute COVID-19 Syndrome ; COVID-19 ; Fatigue
    Language English
    Publishing date 2023-02-15
    Publishing country Netherlands
    Document type Observational Study ; Journal Article
    ZDB-ID 1184721-9
    ISSN 1878-6324 ; 1053-8127
    ISSN (online) 1878-6324
    ISSN 1053-8127
    DOI 10.3233/BMR-220308
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Prediction models for physical function in COVID-19 survivors.

    Vieira, João Eduardo de Azevedo / Ferreira, Arthur de Sá / Monnerat, Laura Braga / Cal, Mariana Soares da / Ghetti, Angelo Thomaz Abalada / Mafort, Thiago Thomaz / Lopes, Agnaldo José

    Journal of bodywork and movement therapies

    2023  Volume 37, Page(s) 70–75

    Abstract: Background: The burden of caring for patients who have survived COVID-19 will be enormous in the coming years, especially with respect to physical function. Physical function has been routinely assessed using the Post-COVID-19 Functional Status (PCFS) ... ...

    Abstract Background: The burden of caring for patients who have survived COVID-19 will be enormous in the coming years, especially with respect to physical function. Physical function has been routinely assessed using the Post-COVID-19 Functional Status (PCFS) scale.
    Aim: This study built prediction models for the PCFS scale using sociodemographic data, clinical findings, lung function, and muscle strength.
    Method: Two hundred and one patients with post-COVID-19 syndrome (PCS) completed the PCFS scale to assess physical function. Their levels of general fatigue were also assessed using the Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-F) scale, handgrip strength (HGS), and spirometry.
    Results: The number of participants who scored 0 (none), 1 (negligible), 2 (slight), 3 (moderate), and 4 (severe) on the PCFS scale was 25 (12%), 40 (20%), 39 (19%), 49 (24%), and 48 (24%), respectively. The PCFS scale was significantly correlated with the following variables: FACIT-F score (r = -0.424, P < 0.001), HGS (r = -0.339, P < 0.001), previous hospitalization (r = 0.226, P = 0.001), body mass index (r = 0.163, P = 0.021), and sex (r = -0.153, P = 0.030). The regression model with the highest coefficient of regression (R = 0.559) included the following variables: age, sex, body mass index, FACIT-F, HGS, and previous hospitalization.
    Conclusions: Worse general fatigue and HGS are associated with more severe physical function impairments in PCS patients. Furthermore, a history of prior hospitalization results in worse physical function. Thus, prediction models for the PCFS scale that incorporate objective measures enable a better assessment of the physical function of these patients, thus helping in the selection of candidates for a program of physical reconditioning.
    MeSH term(s) Humans ; Fatigue/epidemiology ; Hand Strength ; Muscle Strength ; Post-Acute COVID-19 Syndrome ; Survivors ; Male ; Female ; Physical Functional Performance ; Models, Statistical
    Language English
    Publishing date 2023-11-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2029441-4
    ISSN 1532-9283 ; 1360-8592
    ISSN (online) 1532-9283
    ISSN 1360-8592
    DOI 10.1016/j.jbmt.2023.11.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A 34-Year-Old Woman from Brazil with Pulmonary Lymphangioleiomyomatosis Diagnosed by Raised Serum Vascular Endothelial Growth Factor-D (VEGF-D) Levels and Lung Cysts on Computed Tomography Imaging Presenting with COVID-19 Pneumonia.

    Carneiro, Alícia Sales / Mafort, Thiago Thomaz / Lopes, Agnaldo José

    The American journal of case reports

    2021  Volume 22, Page(s) e932660

    Abstract: BACKGROUND There is growing concern about the clinical course of certain diseases in patients who are simultaneously infected by SARS-CoV-2. This report is of a 34-year-old woman from Brazil with a recent diagnosis of pulmonary lymphangioleiomyomatosis ( ... ...

    Abstract BACKGROUND There is growing concern about the clinical course of certain diseases in patients who are simultaneously infected by SARS-CoV-2. This report is of a 34-year-old woman from Brazil with a recent diagnosis of pulmonary lymphangioleiomyomatosis (LAM) diagnosed by raised serum VEGF-D levels and the finding of lung cysts on computed tomography (CT) imaging, who presented with COVID-19 pneumonia. CASE REPORT Five months after the diagnosis of pulmonary LAM, which was based on the presence of diffuse and bilateral cystic lesions on CT scan associated with high serum VEGF-D levels, the patient presented with worsening dyspnea, drop in peripheral oxygen oxygenation, fever, and diffuse myalgia. She was using Sirolimus because it inhibits the development of LAM cells. A worsening of lung abnormalities was demonstrated in a chest CT examination, with the appearance of areas of consolidation and ground-glass abnormalities. A nasal swab sample tested positive for SARS-CoV-2 infection using reverse-transcription polymerase chain reaction. Thus, Sirolimus was suspended because of concern about its immunosuppressive action. She received hospital support following the institutional protocol in force at the time, without the need for invasive mechanical ventilation. After 2 weeks, she was discharged from the hospital, with supplemental oxygen at home and return of Sirolimus. CONCLUSIONS This report has described the presentation of COVID-19 pneumonia due to SARS-CoV-2 infection in a 34-year-old woman with a recent diagnosis of LAM involving the lungs.
    MeSH term(s) Adult ; Brazil ; COVID-19 ; Cysts ; Female ; Humans ; Lung/diagnostic imaging ; Lung Diseases, Interstitial ; Lymphangioleiomyomatosis/diagnostic imaging ; SARS-CoV-2 ; Tomography, X-Ray Computed ; Vascular Endothelial Growth Factor D
    Chemical Substances Vascular Endothelial Growth Factor D
    Language English
    Publishing date 2021-07-31
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 2517183-5
    ISSN 1941-5923 ; 1941-5923
    ISSN (online) 1941-5923
    ISSN 1941-5923
    DOI 10.12659/AJCR.932660
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Ventilation dynamics using a portable device coupled to the six-minute walk test in people with long-COVID syndrome: a preliminary study.

    Oliveira, Jéssica Gabriela Messias / Campos, Renan Pereira / Azevedo, Beatriz Luiza Pinheiro Alves / de Alegria, Samantha Gomes / Litrento, Patrícia Frascari / Mafort, Thiago Thomaz / Lopes, Agnaldo José

    BMC research notes

    2023  Volume 16, Issue 1, Page(s) 99

    Abstract: Objective: To investigated the dynamic ventilatory responses and their influence on functional exercise capacity in patients with long-COVID-19 syndrome (LCS).: Results: Sixteen LCS patients were subjected to resting lung function (spirometry and ... ...

    Abstract Objective: To investigated the dynamic ventilatory responses and their influence on functional exercise capacity in patients with long-COVID-19 syndrome (LCS).
    Results: Sixteen LCS patients were subjected to resting lung function (spirometry and respiratory oscillometry-RO) and cardiopulmonary performance to exercise (Spiropalm®-equipped six-minute walk test-6MWT and cardiopulmonary exercise test-CPX). At rest, spirometry showed a normal, restrictive and obstructive pattern in 87.5%, 6.25% and 6.25% of participants, respectively. At rest, RO showed increased resonance frequency, increased integrated low-frequency reactance and increased difference between resistance at 4-20 Hz (R4-R20) in 43.7%, 50%, and 31.2% of participants, respectively. The median of six-minute walking distance (DTC6) was 434 (386-478) m, which corresponds to a value of 83% (78-97%) of predicted. Dynamic hyperinflation (DH) and reduced breathing reserve (BR) were detected in 62.5% and 12.5% of participants, respectively. At CPX, the median peak oxygen uptake (VO
    MeSH term(s) Humans ; Walk Test ; Post-Acute COVID-19 Syndrome ; COVID-19/complications ; Lung ; Walking/physiology ; Exercise Test/methods ; Pulmonary Disease, Chronic Obstructive
    Language English
    Publishing date 2023-06-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 2413336-X
    ISSN 1756-0500 ; 1756-0500
    ISSN (online) 1756-0500
    ISSN 1756-0500
    DOI 10.1186/s13104-023-06374-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Chocolate-Colored Pseudochylothorax in a Woman with a History of Pleuropulmonary Tuberculosis.

    Monnerat, Laura Braga / Louzada, Elisa Barbosa / Braga, Vanessa Godinho Souza / da Cal, Mariana Soares / Lopes, Agnaldo José / Mafort, Thiago Thomaz

    The American journal of case reports

    2023  Volume 24, Page(s) e939473

    Abstract: BACKGROUND Pseudochylothorax is a rare entity, with only a few hundred case reports worldwide. It presents as a pleural effusion rich in lipids, typically with a cloudy, milky appearance. The diagnosis is made based on the levels of cholesterol and ... ...

    Abstract BACKGROUND Pseudochylothorax is a rare entity, with only a few hundred case reports worldwide. It presents as a pleural effusion rich in lipids, typically with a cloudy, milky appearance. The diagnosis is made based on the levels of cholesterol and triglycerides in the pleural fluid. CASE REPORT This is the case report of a 55-year-old woman with a history of pleuropulmonary tuberculosis that was treated in childhood, with a new infection and treatment in adulthood that evolved to a left pleural effusion. Thirteen years after completing her last treatment for tuberculosis, the patient developed general fatigue and dyspnea on exertion. Computed tomography of the chest confirmed the presence of a pleural collection in the same location as in adolescence, suggesting a chronic evolution with encystation. The patient underwent ultrasound-guided diagnostic thoracentesis. The collected liquid was thick, chocolate-colored, with the following biochemical characteristics: pH, 7.3; glucose, 37.9 mg/dL; LDL, 2059.8 IU/L; total protein, 8.8 mg/dL; triglycerides, 90 mg/dL; adenosine deaminase, 56 U/L; and cholesterol, 300 mg/dL. The effusion was characterized as a pseudochylothorax. The cell count showed 631 000 leukocytes/µL, with 87.9% polymorphonuclear cells. Owing to the patient's respiratory symptoms, an evacuatory thoracentesis was performed. After the procedure, the patient's symptoms improved. CONCLUSIONS Although pseudochylothorax is a rare condition, its possibility must always be kept in mind to avoid the hazards of misdiagnosis. In addition to the 'classic' milky and machine oil appearance, a chocolate-colored appearance should also serve as a clue to the diagnosis of pseudochylothorax.
    MeSH term(s) Adolescent ; Female ; Humans ; Middle Aged ; Chocolate ; Pleural Effusion/etiology ; Pleura ; Exudates and Transudates ; Dyspnea
    Language English
    Publishing date 2023-06-15
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 2517183-5
    ISSN 1941-5923 ; 1941-5923
    ISSN (online) 1941-5923
    ISSN 1941-5923
    DOI 10.12659/AJCR.939473
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Reanalysis and validation of the transcriptional pleural fluid signature in pleural tuberculosis.

    Corrêa, Raquel da Silva / Leal-Calvo, Thyago / Mafort, Thiago Thomaz / Santos, Ana Paula / Leung, Janaína / Pinheiro, Roberta Olmo / Rufino, Rogério / Moraes, Milton Ozório / Rodrigues, Luciana Silva

    Frontiers in immunology

    2024  Volume 14, Page(s) 1256558

    Abstract: Introduction: Pleural tuberculosis (PlTB), the most common site of extrapulmonary TB, is characterized by a paucibacillary nature and a compartmentalized inflammatory response in the pleural cavity, both of which make diagnosis and management extremely ... ...

    Abstract Introduction: Pleural tuberculosis (PlTB), the most common site of extrapulmonary TB, is characterized by a paucibacillary nature and a compartmentalized inflammatory response in the pleural cavity, both of which make diagnosis and management extremely challenging. Although transcriptional signatures for pulmonary TB have already been described, data obtained by using this approach for extrapulmonary tuberculosis and, specifically, for pleural tuberculosis are scarce and heterogeneous. In the present study, a set of candidate genes previously described in pulmonary TB was evaluated to identify and validate a transcriptional signature in clinical samples from a Brazilian cohort of PlTB patients and those with other exudative causes of pleural effusion.
    Methods: As a first step, target genes were selected by a random forest algorithm with recursive feature elimination (RFE) from public microarray datasets. Then, peripheral blood (PB) and pleural fluid (PF) samples from recruited patients presenting exudative pleural effusion were collected during the thoracentesis procedure. Transcriptional analysis of the selected top 10 genes was performed by quantitative RT-PCR (RT-qPCR).
    Results: Reanalysis of the public datasets identified a set of candidate genes (
    Conclusion: CARD17
    MeSH term(s) Humans ; Tuberculosis, Pleural/diagnosis ; Tuberculosis, Pleural/genetics ; Exudates and Transudates ; Tuberculosis, Pulmonary ; Pleural Effusion/diagnosis ; Pleural Effusion/genetics ; Pleural Effusion/metabolism ; Brazil ; Butyrophilins ; Antigens, CD
    Chemical Substances BTN3A1 protein, human ; Butyrophilins ; Antigens, CD
    Language English
    Publishing date 2024-01-15
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2023.1256558
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Can home rehabilitation impact impulse oscillometry and lung ultrasound findings in patients with scleroderma-associated interstitial lung disease? A pilot study.

    de Alegria, Samantha Gomes / Litrento, Patrícia Frascari / de Oliveira Farias, Iasmim / Mafort, Thiago Thomaz / Lopes, Agnaldo José

    BMC research notes

    2022  Volume 15, Issue 1, Page(s) 176

    Abstract: Objective: Exercise has been demonstrated to be beneficial for improving physical capacity and quality of life in people with scleroderma, although knowledge of its impact on the respiratory system is limited. This study evaluated the impact of ... ...

    Abstract Objective: Exercise has been demonstrated to be beneficial for improving physical capacity and quality of life in people with scleroderma, although knowledge of its impact on the respiratory system is limited. This study evaluated the impact of therapist-oriented home rehabilitation (TOHR) on impulse oscillometry (IOS) and lung ultrasound (LUS) findings in patients with scleroderma-associated interstitial lung disease (ILD).
    Results: Twelve women with scleroderma underwent spirometry, IOS, and LUS before and after performing TOHR. Regarding spirometry, a normal pattern and restrictive damage were observed in five (41.7%) and seven (58.3%) participants pre-TOHR and post-TOHR, respectively. For IOS, an abnormal result was detected in nine (75%) pre-TOHR participants and six (50%) post-TOHR participants. Heterogeneity of resistance between 4-20 Hz (R4-R20) > 20% of the predicted value was observed in eight (66.7%) pre-TOHR participants and three (25%) post-TOHR participants (P = 0.031). An abnormal LUS result was observed in nine (75%) participants both pre-TOHR and post-TOHR. The main change observed was B-lines > 2, which was noted in nine (75%) participants both pre-TOHR and post-TOHR. Our findings suggest that TOHR for women with scleroderma-associated ILD improves the resistance and reactance measured by IOS, including small airway disease. Trial Registration ClinicalTrials.gov ID: NCT05041868 Registered on: 13th September 2021.
    MeSH term(s) Female ; Humans ; Lung/diagnostic imaging ; Lung Diseases, Interstitial/diagnostic imaging ; Lung Diseases, Interstitial/etiology ; Oscillometry ; Pilot Projects ; Quality of Life ; Spirometry
    Language English
    Publishing date 2022-05-15
    Publishing country England
    Document type Clinical Trial ; Journal Article
    ZDB-ID 2413336-X
    ISSN 1756-0500 ; 1756-0500
    ISSN (online) 1756-0500
    ISSN 1756-0500
    DOI 10.1186/s13104-022-06064-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Can home rehabilitation impact impulse oscillometry and lung ultrasound findings in patients with scleroderma-associated interstitial lung disease? A pilot study

    Samantha Gomes de Alegria / Patrícia Frascari Litrento / Iasmim de Oliveira Farias / Thiago Thomaz Mafort / Agnaldo José Lopes

    BMC Research Notes, Vol 15, Iss 1, Pp 1-

    2022  Volume 6

    Abstract: Abstract Objective Exercise has been demonstrated to be beneficial for improving physical capacity and quality of life in people with scleroderma, although knowledge of its impact on the respiratory system is limited. This study evaluated the impact of ... ...

    Abstract Abstract Objective Exercise has been demonstrated to be beneficial for improving physical capacity and quality of life in people with scleroderma, although knowledge of its impact on the respiratory system is limited. This study evaluated the impact of therapist-oriented home rehabilitation (TOHR) on impulse oscillometry (IOS) and lung ultrasound (LUS) findings in patients with scleroderma-associated interstitial lung disease (ILD). Results Twelve women with scleroderma underwent spirometry, IOS, and LUS before and after performing TOHR. Regarding spirometry, a normal pattern and restrictive damage were observed in five (41.7%) and seven (58.3%) participants pre-TOHR and post-TOHR, respectively. For IOS, an abnormal result was detected in nine (75%) pre-TOHR participants and six (50%) post-TOHR participants. Heterogeneity of resistance between 4–20 Hz (R4-R20) > 20% of the predicted value was observed in eight (66.7%) pre-TOHR participants and three (25%) post-TOHR participants (P = 0.031). An abnormal LUS result was observed in nine (75%) participants both pre-TOHR and post-TOHR. The main change observed was B-lines > 2, which was noted in nine (75%) participants both pre-TOHR and post-TOHR. Our findings suggest that TOHR for women with scleroderma-associated ILD improves the resistance and reactance measured by IOS, including small airway disease. Trial Registration ClinicalTrials.gov ID: NCT05041868 Registered on: 13th September 2021.
    Keywords Scleroderma ; Pulmonary function test ; Small airway disease ; Lung ultrasound ; Medicine ; R ; Biology (General) ; QH301-705.5 ; Science (General) ; Q1-390
    Subject code 150
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Mortality and comorbidities in patients with bronchiectasis over a 3-year follow-up.

    Mateus, Simone Paulo / Ribeiro-Alves, Marcelo / Salles, Raquel Esteves Brandão / Costa, Walter / Costa, Claudia Henrique da / Lopes, Agnaldo José / Bártholo, Thiago Prudente / Mafort, Thiago Thomaz / Tura, Bernardo Rangel / Rufino, Rogério

    Medicine

    2022  Volume 101, Issue 52, Page(s) e32537

    Abstract: To identify the risk factors associated with all-cause mortality in patients with noncystic fibrosis bronchiectasis (NCFB). This prospective cohort study included 120 adult patients with NCFB, who were regularly treated at a specialized outpatient clinic ...

    Abstract To identify the risk factors associated with all-cause mortality in patients with noncystic fibrosis bronchiectasis (NCFB). This prospective cohort study included 120 adult patients with NCFB, who were regularly treated at a specialized outpatient clinic of a university hospital between January 2017 and June 2020. All patients were diagnosed using high-resolution computed tomography. Demographic and clinical data, pulmonary function tests, and the Euro-quality-of-life 5-domain 3-level questionnaire were analyzed. The factors associated with death were determined using the Cox proportional hazards model. The all-cause mortality rate at 41 months was 10.8%. Adjusted multivariate analysis showed that the main contributing predictors for mortality were female sex, smoking, diabetes, chronic obstructive pulmonary disease, emergency visits, use of antibiotics due to exacerbation, secretion color change, exacerbation, predicted forced expiratory volume in 1 second, predicted forced vital capacity, lack of respiratory physiotherapy, absence of vaccination against pneumococci, and mobility domain. Multiple factors contribute to unfavorable outcomes in patients with NCFB, and early recognition of these factors may improve care management.
    MeSH term(s) Adult ; Humans ; Female ; Male ; Prospective Studies ; Follow-Up Studies ; Bronchiectasis/complications ; Pulmonary Disease, Chronic Obstructive/complications ; Comorbidity
    Language English
    Publishing date 2022-12-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80184-7
    ISSN 1536-5964 ; 0025-7974
    ISSN (online) 1536-5964
    ISSN 0025-7974
    DOI 10.1097/MD.0000000000032537
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Ventilation dynamics using a portable device coupled to the six-minute walk test in people with long-COVID syndrome

    Jéssica Gabriela Messias Oliveira / Renan Pereira Campos / Beatriz Luiza Pinheiro Alves Azevedo / Samantha Gomes de Alegria / Patrícia Frascari Litrento / Thiago Thomaz Mafort / Agnaldo José Lopes

    BMC Research Notes, Vol 16, Iss 1, Pp 1-

    a preliminary study

    2023  Volume 6

    Abstract: Abstract Objective To investigated the dynamic ventilatory responses and their influence on functional exercise capacity in patients with long-COVID-19 syndrome (LCS). Results Sixteen LCS patients were subjected to resting lung function (spirometry and ... ...

    Abstract Abstract Objective To investigated the dynamic ventilatory responses and their influence on functional exercise capacity in patients with long-COVID-19 syndrome (LCS). Results Sixteen LCS patients were subjected to resting lung function (spirometry and respiratory oscillometry-RO) and cardiopulmonary performance to exercise (Spiropalm®-equipped six-minute walk test-6MWT and cardiopulmonary exercise test-CPX). At rest, spirometry showed a normal, restrictive and obstructive pattern in 87.5%, 6.25% and 6.25% of participants, respectively. At rest, RO showed increased resonance frequency, increased integrated low-frequency reactance and increased difference between resistance at 4–20 Hz (R4-R20) in 43.7%, 50%, and 31.2% of participants, respectively. The median of six-minute walking distance (DTC6) was 434 (386–478) m, which corresponds to a value of 83% (78–97%) of predicted. Dynamic hyperinflation (DH) and reduced breathing reserve (BR) were detected in 62.5% and 12.5% of participants, respectively. At CPX, the median peak oxygen uptake (VO2peak) was 19 (14–37) ml/kg/min. There was a significant correlation of 6MWD with both R4-R20 (rs=-0.499, P = 0.039) and VO2peak (rs=0.628, P = 0.009). Our results indicate that DH and low BR are contributors to poor exercise performance, which is associated with peripheral airway disease. These are promising results considering that they were achieved with simple, portable ventilatory and metabolic systems.
    Keywords Long-COVID syndrome ; Six-minute walk test ; Pulmonary function testing ; Cardiopulmonary exercise test ; Small airway disease ; Medicine ; R ; Biology (General) ; QH301-705.5 ; Science (General) ; Q1-390
    Subject code 796
    Language English
    Publishing date 2023-06-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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