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The association of breathing pattern with exercise tolerance and perceived fatigue in women with systemic lupus erythematosus: an exploratory case-control study. Rheumatol Int 2021; 42:2003-2011. [PMID: 34727196 DOI: 10.1007/s00296-021-05005-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/19/2021] [Indexed: 10/19/2022]
Abstract
The aims of the study were to (1) to characterize the breathing pattern and work of breathing during peak exercise in patients with SLE; (2) to examine the extent to which the breathing pattern and work of breathing impact the exercise capacity and fatigue. Forty-one women participated in the study (SLE: n = 23, median = 35, range = 21-57 years, control: n = 18, median = 38, range = 22-45 years). Each subject performed a treadmill cardiopulmonary exercise test (a modified Bruce treadmill protocol) ending with volitional exhaustion. Breathing mechanic was characterized by measures of expired minute volume (VE), tidal volume (Vt), respiratory rate (f), work of breathing, and cardiorespiratory fitness was quantified by measures of peak oxygen consumption (VO2) and time to exhaustion. Data presented as median and interquartile range (IQR). Women with SLE had lower Vt {1221 [488.8] mL/min vs. 1716 [453.1] mL; p = .006}, VE {58.9 [18.9] L/min vs 70 [28.1] L/min, p = 0.04} and increased breathing frequency {51.5 [10.8] vs 43.6 [37.8] bpm, p = 0.01} compared to the control group. The time to exhaustion and peak VO2 during the CPET were significantly reduced in those with SLE compared to controls {13.3 [10.2] vs 16.1 [2.2] min; p = 0.004}, {20 [6.1] mL/kg/min vs 26.6 [7] mL/kg/min p < 0.001}, respectively. Differences remained when the analyses were controlled for the observed differences in peak VO2. When the regression model adjusted for the peak VO2, it had been shown that Vt, WOB and f were explained variances in the fatigue severity by 64% [p < 0.001]. The decline in VE and Vt coupled with a decreased peak VO2, and work of breathing may have contributed to low cardiorespiratory fitness and fatigue in patients with systemic lupus erythematosus.
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Satış H, Cindil E, Salman RB, Yapar D, Temel E, Demir NB, Babaoğlu H, Gündoğdu O, Ataş N, Şendur H, Avanoğlu Güler A, Karadeniz H, Tufan A, Öztürk MA, Haznedaroğlu Ş, Göker B. Diaphragmatic muscle thickness and diaphragmatic function are reduced in patients with systemic lupus erythematosus compared to those with primary Sjögren's syndrome. Lupus 2020; 29:715-720. [PMID: 32338144 DOI: 10.1177/0961203320919848] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Systemic lupus erythematosus (SLE) is associated with an increased risk of pulmonary infections, as well as a rare condition known as shrinking lung syndrome (SLS). The diaphragm has an important role to play in lung physiology and might also play a role in these adverse events. Here, we aimed to investigate whether SLE patients have impairment in their diaphragmatic muscle thickness and function with respect to another connective-tissue disease: primary Sjögren's syndrome (pSS). METHOD Patients diagnosed with SLE who were in remission or who had minimal disease activity and had at least one year of follow-up were included in this study. Patients with known lung pathology and smokers were excluded. Patients with pSS constituted the second experimental group. Ultrasonographic evaluation of the diaphragmatic muscle was conducted by an experienced independent sonographer at three time points, diaphragmatic thickness during deep and quiet inspiration and maximum expiration being measured. Diaphragmatic muscle function was evaluated with maximum expiratory pressure (MEP) and maximum inspiratory pressure (MIP). RESULTS A total of 115 patients were studied (n = 39 SLE; n = 76 pSS). The mean ± standard deviation (SD) thickness of the diaphragmatic muscles during quiet inspiration was significantly reduced in patients with SLE compared to patients with pSS (2.32 mm vs. 2.81 mm; p < 0.05). Similarly, the thickness during deep inspiration and at maximum deep expiration were significantly lower in SLE patients (2.88 mm vs. 3.29 mm and 1.92 mm vs. 2.33 mm, respectively; p < 0.01). MIPs and MEPs, defined as the percentages of expected values, were significantly lower in patients with SLE compared to those with pSS (80% vs. 92% and 76% vs. 120%, respectively; p < 0.05). Diaphragmatic muscle thickness during deep inspiration demonstrated a moderate correlation with MIP (r = 0.434; p = 0.001). CONCLUSION SLE patients had reduced diaphragmatic muscle thickness compared to those with pSS, which was associated with impaired functional tests. Further prospective studies are needed to investigate whether structural and functional impairments in diaphragmatic muscle play a role in an increased risk of pulmonary infections and SLS in patients with SLE.
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Affiliation(s)
- Hasan Satış
- Faculty of Medicine, Rheumatology Department, Gazi University, Ankara, Turkey
| | - Emetullah Cindil
- Faculty of Medicine, Radiology Department, Gazi University, Ankara, Turkey
| | - Reyhan B Salman
- Faculty of Medicine, Rheumatology Department, Gazi University, Ankara, Turkey
| | - Dilek Yapar
- Faculty of Medicine, Public Health and Biostatistics, Gazi University, Ankara Turkey
| | - Esra Temel
- Faculty of Medicine, Radiology Department, Gazi University, Ankara, Turkey
| | - Nur B Demir
- Faculty of Medicine, Radiology Department, Gazi University, Ankara, Turkey
| | - Hakan Babaoğlu
- Faculty of Medicine, Rheumatology Department, Gazi University, Ankara, Turkey
| | - Onur Gündoğdu
- Faculty of Medicine, Radiology Department, Gazi University, Ankara, Turkey
| | - Nuh Ataş
- Faculty of Medicine, Rheumatology Department, Gazi University, Ankara, Turkey
| | - Halit Şendur
- Faculty of Medicine, Radiology Department, Gazi University, Ankara, Turkey
| | | | - Hazan Karadeniz
- Faculty of Medicine, Rheumatology Department, Gazi University, Ankara, Turkey
| | - Abdurrahman Tufan
- Faculty of Medicine, Rheumatology Department, Gazi University, Ankara, Turkey
| | - Mehmet A Öztürk
- Faculty of Medicine, Rheumatology Department, Gazi University, Ankara, Turkey
| | | | - Berna Göker
- Faculty of Medicine, Rheumatology Department, Gazi University, Ankara, Turkey
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Ciancio N, Pavone M, Torrisi SE, Vancheri A, Sambataro D, Palmucci S, Vancheri C, Di Marco F, Sambataro G. Contribution of pulmonary function tests (PFTs) to the diagnosis and follow up of connective tissue diseases. Multidiscip Respir Med 2019; 14:17. [PMID: 31114679 PMCID: PMC6518652 DOI: 10.1186/s40248-019-0179-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 03/15/2019] [Indexed: 12/22/2022] Open
Abstract
Introduction Connective Tissue Diseases (CTDs) are systemic autoimmune conditions characterized by frequent lung involvement. This usually takes the form of Interstitial Lung Disease (ILD), but Obstructive Lung Disease (OLD) and Pulmonary Artery Hypertension (PAH) can also occur. Lung involvement is often severe, representing the first cause of death in CTD. The aim of this study is to highlight the role of Pulmonary Function Tests (PFTs) in the diagnosis and follow up of CTD patients. Main body Rheumatoid Arthritis (RA) showed mainly an ILD with a Usual Interstitial Pneumonia (UIP) pattern in High-Resolution Chest Tomography (HRCT). PFTs are able to highlight a RA-ILD before its clinical onset and to drive follow up of patients with Forced Vital Capacity (FVC) and Carbon Monoxide Diffusing Capacity (DLCO). In the course of Scleroderma Spectrum Disorders (SSDs) and Idiopathic Inflammatory Myopathies (IIMs), DLCO appears to be more sensitive than FVC in highlighting an ILD, but it can be compromised by the presence of PAH. A restrictive respiratory pattern can be present in IIMs and Systemic Lupus Erythematosus due to the inflammatory involvement of respiratory muscles, the presence of fatigue or diaphragm distress. Conclusions The lung should be carefully studied during CTDs. PFTs can represent an important prognostic tool for diagnosis and follow up of RA-ILD, but, on their own, lack sufficient specificity or sensitivity to describe lung involvement in SSDs and IIMs. Several composite indexes potentially able to describe the evolution of lung damage and response to treatment in SSDs are under investigation. Considering the potential severity of these conditions, an HRCT jointly with PFTs should be performed in all new diagnoses of SSDs and IIMs. Moreover, follow up PFTs should be interpreted in the light of the risk factor for respiratory disease related to each disease.
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Affiliation(s)
- Nicola Ciancio
- 1Regional Referral Center for Rare Lung Diseases, A. O. U. "Policlinico-Vittorio Emanuele" Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy.,Respiratory Physiopathology Group. Società Italiana di Pneumologia. Italian Respiratory Society (SIP/IRS), Milan, Italy
| | - Mauro Pavone
- 1Regional Referral Center for Rare Lung Diseases, A. O. U. "Policlinico-Vittorio Emanuele" Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Sebastiano Emanuele Torrisi
- 1Regional Referral Center for Rare Lung Diseases, A. O. U. "Policlinico-Vittorio Emanuele" Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Ada Vancheri
- 1Regional Referral Center for Rare Lung Diseases, A. O. U. "Policlinico-Vittorio Emanuele" Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Domenico Sambataro
- Artroreuma S.R.L. Outpatient Clinic accredited with the Italian National Health System, Corso S. Vito 53, 95030 Mascalucia (CT), Italy
| | - Stefano Palmucci
- 4Department of Medical Surgical Sciences and Advanced Technologies- Radiology I Unit, University Hospital "Policlinico-Vittorio Emanuele", Catania, Italy
| | - Carlo Vancheri
- 1Regional Referral Center for Rare Lung Diseases, A. O. U. "Policlinico-Vittorio Emanuele" Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Fabiano Di Marco
- 5Department of Health Sciences, Università degli studi di Milano, Head Respiratory Unit, Papa Giovanni XXIII Hospital, Bergamo, Italy
| | - Gianluca Sambataro
- 1Regional Referral Center for Rare Lung Diseases, A. O. U. "Policlinico-Vittorio Emanuele" Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy.,Artroreuma S.R.L. Outpatient Clinic accredited with the Italian National Health System, Corso S. Vito 53, 95030 Mascalucia (CT), Italy
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