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Scott JM, Lee J, Michalski MG, Batch K, Simpson AL, Peoples J, Lee CP, Harrison JN, Yu AF, Sasso JP, Dang C, Moskowitz CS, Jones LW, Eves ND. Mechanisms of Exercise Intolerance Across the Breast Cancer Continuum: A Pooled Analysis of Individual Patient Data. Med Sci Sports Exerc 2024; 56:590-599. [PMID: 38485730 PMCID: PMC10948020 DOI: 10.1249/mss.0000000000003348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
PURPOSE The purpose of this study is to evaluate the prevalence of abnormal cardiopulmonary responses to exercise and pathophysiological mechanism(s) underpinning exercise intolerance across the continuum of breast cancer (BC) care from diagnosis to metastatic disease. METHODS Individual participant data from four randomized trials spanning the BC continuum ([1] prechemotherapy [n = 146], [2] immediately postchemotherapy [n = 48], [3] survivorship [n = 138], and [4] metastatic [n = 47]) were pooled and compared with women at high-risk of BC (BC risk; n = 64). Identical treadmill-based peak cardiopulmonary exercise testing protocols evaluated exercise intolerance (peak oxygen consumption; V̇O2peak) and other resting, submaximal, and peak cardiopulmonary responses. The prevalence of 12 abnormal exercise responses was evaluated. Graphical plots of exercise responses were used to identify oxygen delivery and/or uptake mechanisms contributing to exercise intolerance. Unsupervised, hierarchical cluster analysis was conducted to explore exercise response phenogroups. RESULTS Mean V̇O2peak was 2.78 ml O2.kg-1·min-1 (95% confidence interval [CI], -3.94, -1.62 mL O2.kg-1·min-1; P < 0.001) lower in the pooled BC cohort (52 ± 11 yr) than BC risk (55 ± 10 yr). Compared with BC risk, the pooled BC cohort had a 2.5-fold increased risk of any abnormal cardiopulmonary response (odds ratio, 2.5; 95% confidence interval, 1.2, 5.3; P = 0.014). Distinct exercise responses in BC reflected impaired oxygen delivery and uptake relative to control, although considerable inter-individual heterogeneity within cohorts was observed. In unsupervised, hierarchical cluster analysis, six phenogroups were identified with marked differences in cardiopulmonary response patterns and unique clinical characteristics. CONCLUSIONS Abnormal cardiopulmonary response to exercise is common in BC and is related to impairments in oxygen delivery and uptake. The identification of exercise response phenogroups could help improve cardiovascular risk stratification and guide investigation of targeted exercise interventions.
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Affiliation(s)
- Jessica M. Scott
- Memorial Sloan Kettering Cancer Center, New York, NY
- Weill Cornell Medical College, New York, NY
| | - Jasme Lee
- Memorial Sloan Kettering Cancer Center, New York, NY
| | | | | | | | | | | | | | - Anthony F. Yu
- Memorial Sloan Kettering Cancer Center, New York, NY
- Weill Cornell Medical College, New York, NY
| | | | - Chau Dang
- Memorial Sloan Kettering Cancer Center, New York, NY
- Weill Cornell Medical College, New York, NY
| | - Chaya S. Moskowitz
- Memorial Sloan Kettering Cancer Center, New York, NY
- Weill Cornell Medical College, New York, NY
| | - Lee W. Jones
- Memorial Sloan Kettering Cancer Center, New York, NY
- Weill Cornell Medical College, New York, NY
| | - Neil D. Eves
- University of British Columbia, Kelowna, BC, CANADA
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Behnia M, Sietsema KE. Utility of Cardiopulmonary Exercise Testing in Chronic Obstructive Pulmonary Disease: A Review. Int J Chron Obstruct Pulmon Dis 2023; 18:2895-2910. [PMID: 38089541 PMCID: PMC10710955 DOI: 10.2147/copd.s432841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 10/17/2023] [Indexed: 12/18/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a disease defined by airflow obstruction with a high morbidity and mortality and significant economic burden. Although pulmonary function testing is the cornerstone in diagnosis of COPD, it cannot fully characterize disease severity or cause of dyspnea because of disease heterogeneity and variable related and comorbid conditions affecting cardiac, vascular, and musculoskeletal systems. Cardiopulmonary exercise testing (CPET) is a valuable tool for assessing physical function in a wide range of clinical conditions, including COPD. Familiarity with measurements made during CPET and its potential to aid in clinical decision-making related to COPD can thus be useful to clinicians caring for this population. This review highlights pulmonary and extrapulmonary impairments that can contribute to exercise limitation in COPD. Key elements of CPET are identified with an emphasis on measurements most relevant to COPD. Finally, clinical applications of CPET demonstrated to be of value in the COPD setting are identified. These include quantifying functional capacity, differentiating among potential causes of symptoms and limitation, prognostication and risk assessment for operative procedures, and guiding exercise prescription.
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Affiliation(s)
- Mehrdad Behnia
- Pulmonary and Critical Care, University of Central Florida, Orlando, FL, USA
| | - Kathy E Sietsema
- The Lundquist Institute for Biomedical Innovation, Harbor-UCLA Medical Center, Torrance, CA, USA
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Bunel V, Brioude G, Deslée G, Stelianides S, Mal H. [Selection of candidates for lung transplantation for chronic obstructive pulmonary disease]. Rev Mal Respir 2023; 40 Suppl 1:e22-e32. [PMID: 36641354 DOI: 10.1016/j.rmr.2022.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- V Bunel
- Inserm U1152, service de pneumologie B et transplantation pulmonaire, université de Paris, hôpital Bichat, AP-HP, Paris, France.
| | - G Brioude
- Service de chirurgie thoracique et des maladies de l'œsophage, Aix-Marseille université, assistance publique-hôpitaux de Marseille, hôpital Nord, chemin des Bourrely, 13915 Marseille, France
| | - G Deslée
- Inserm U1250, service de pneumologie, CHU de Reims, université Reims Champagne Ardenne, Reims, France
| | - S Stelianides
- Institut de réadaptation d'Achères, 7, place Simone-Veil, 78260 Achères, France
| | - H Mal
- Inserm U1152, service de pneumologie B et transplantation pulmonaire, université de Paris, hôpital Bichat, AP-HP, Paris, France
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da Luz Goulart C, Oliveira MR, Sendín FA, Mendes RG, Arena R, Borghi-Silva A. Prognostic value of key variables from cardiopulmonary exercise testing in patients with COPD: 42-month follow-up. Respir Med 2022; 197:106856. [PMID: 35461168 DOI: 10.1016/j.rmed.2022.106856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 03/29/2022] [Accepted: 04/17/2022] [Indexed: 11/26/2022]
Abstract
AIM To identify better predictors of early death in patients with chronic obstructive pulmonary disease (COPD) using potential predictors derived from key measures obtained from cardiopulmonary exercise testing (CPET). METHODS This is a prospective, cohort study with 42-month follow-up in 126 COPD patients. Every patient completed the clinical evaluation, followed by a pulmonary function test and CPET. CPET was performed on a cycle ergometer with electromagnetic braking and ventilatory expired analysis was measured breath-by-breath using a computer-based system. Peak oxygen consumption (V̇O2, mlO2. kg-1. min-1), minute ventilation/carbon dioxide production and the, minute ventilation (V̇E, L/min), and the V̇E/carbon dioxide production (V̇E/V̇CO2) slope were obtained from CPET. RESULTS 48 (38%) patients died during the 42-month follow-up. Kaplan Meier analysis revealed a V̇E/V̇CO2 slope ≥30, peak V̇E ≤ 25.7L/min and peak V̇O2 ≤ 13.8 mlO2. kg-1. min-1were strong predictors of mortality in COPD patients. Cox regression revealed that the V̇O2 peak ≤13.8 mlO2. kg-1. min-1 (CI 95% 0.08-0.93), V̇E/V̇CO2 slope ≥30 (CI 95% 0.07-0.94), V̇E peak ≤25.7 L/min (CI 95% 0.01-0.15), Sex (CI 95% 0.04-0.55) and Age (CI 95% 1.03-1.2) were the main predictors of mortality risk. CONCLUSION Diminished exercise capacity and peak ventilation as well as ventilatory inefficiency are independent prognostic markers. Similar to patients with heart failure, CPET may be a valuable clinical assessment in the COPD population.
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Affiliation(s)
- Cássia da Luz Goulart
- Cardiopulmonary Physiotherapy Laboratory, Physiotherapy Department, Federal University of Sao Carlos, UFSCar, Rodovia Washington Luis, KM 235, Monjolinho, CEP: 13565-905, Sao Carlos, SP, Brazil
| | - Murilo Rezende Oliveira
- Cardiopulmonary Physiotherapy Laboratory, Physiotherapy Department, Federal University of Sao Carlos, UFSCar, Rodovia Washington Luis, KM 235, Monjolinho, CEP: 13565-905, Sao Carlos, SP, Brazil
| | - Francisco Alburquerque Sendín
- Profesor Titular de Universidad, departamento de enfermería, farmacología y fisioterapia facultad de medicina y enfermería, Cordoba, Spain
| | - Renata Gonçalves Mendes
- Cardiopulmonary Physiotherapy Laboratory, Physiotherapy Department, Federal University of Sao Carlos, UFSCar, Rodovia Washington Luis, KM 235, Monjolinho, CEP: 13565-905, Sao Carlos, SP, Brazil
| | - Ross Arena
- Department of Physical Therapy, College of Applied Health Sciences, University of Illinois at Chicago (UIC), Chicago, IL, USA
| | - Audrey Borghi-Silva
- Cardiopulmonary Physiotherapy Laboratory, Physiotherapy Department, Federal University of Sao Carlos, UFSCar, Rodovia Washington Luis, KM 235, Monjolinho, CEP: 13565-905, Sao Carlos, SP, Brazil.
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Gelinas J, Harper M, Sasso J, Wright S, Melzer B, Agar G, Guenette J, duManoir G, Roman M, Rolf JD, Eves N. Phenotyping Cardiopulmonary Exercise Limitations in Chronic Obstructive Pulmonary Disease. Front Physiol 2022; 13:816586. [PMID: 35242051 PMCID: PMC8886157 DOI: 10.3389/fphys.2022.816586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 01/26/2022] [Indexed: 11/24/2022] Open
Abstract
Background Exercise limitation in chronic obstructive pulmonary disease (COPD) is commonly attributed to abnormal ventilatory mechanics and/or skeletal muscle function, while cardiovascular contributions remain relatively understudied. To date, the integrative exercise responses associated with different cardiopulmonary exercise limitation phenotypes in COPD have not been explored but may provide novel therapeutic utility. This study determined the ventilatory, cardiovascular, and metabolic responses to incremental exercise in patients with COPD with different exercise limitation phenotypes. Methods Patients with COPD (n = 95, FEV1:23–113%pred) performed a pulmonary function test and incremental cardiopulmonary exercise test. Exercise limitation phenotypes were classified as: ventilatory [peak ventilation (VEpeak)/maximal ventilatory capacity (MVC) ≥ 85% or MVC-VEpeak ≤ 11 L/min, and peak heart rate (HRpeak) < 90%pred], cardiovascular (VEpeak/MVC < 85% or MVC-VEpeak > 11 L/min, and HRpeak ≥ 90%pred), or combined (VEpeak/MVC ≥ 85% or MVC-VEpeak ≤ 11 L/min, and HRpeak ≥ 90%pred). Results FEV1 varied within phenotype: ventilatory (23–75%pred), combined (28–90%pred), and cardiovascular (68–113%pred). The cardiovascular phenotype had less static hyperinflation, a lower end-expiratory lung volume and larger tidal volume at peak exercise compared to both other phenotypes (p < 0.01 for all). The cardiovascular phenotype reached a higher VEpeak (60.8 ± 11.5 L/min vs. 45.3 ± 15.5 L/min, p = 0.002), cardiopulmonary fitness (VO2peak: 20.6 ± 4.0 ml/kg/min vs. 15.2 ± 3.3 ml/kg/min, p < 0.001), and maximum workload (103 ± 34 W vs. 72 ± 27 W, p < 0.01) vs. the ventilatory phenotype, but was similar to the combined phenotype. Conclusion Distinct exercise limitation phenotypes were identified in COPD that were not solely dependent upon airflow limitation severity. Approximately 50% of patients reached maximal heart rate, indicating that peak cardiac output and convective O2 delivery contributed to exercise limitation. Categorizing patients with COPD phenotypically may aid in optimizing exercise prescription for rehabilitative purposes.
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Affiliation(s)
- Jinelle Gelinas
- Centre for Heart, Lung and Vascular Health, University of British Columbia, Kelowna, BC, Canada
| | - Megan Harper
- Centre for Heart, Lung and Vascular Health, University of British Columbia, Kelowna, BC, Canada
| | - John Sasso
- Centre for Heart, Lung and Vascular Health, University of British Columbia, Kelowna, BC, Canada
| | - Stephen Wright
- Centre for Heart, Lung and Vascular Health, University of British Columbia, Kelowna, BC, Canada
| | - Bernie Melzer
- Interior Health Authority, Kelowna General Hospital, Kelowna, BC, Canada
| | - Gloria Agar
- Interior Health Authority, Kelowna General Hospital, Kelowna, BC, Canada
| | - Jordan Guenette
- Department of Physical Therapy and Centre for Heart Lung Innovation, University of British Columbia and St. Paul's Hospital, Vancouver, BC, Canada
| | - Gregory duManoir
- Centre for Heart, Lung and Vascular Health, University of British Columbia, Kelowna, BC, Canada
| | - Michael Roman
- Faculty of Medicine, University of Calgary, Calgary, AB, Canada
| | - J Douglass Rolf
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Neil Eves
- Centre for Heart, Lung and Vascular Health, University of British Columbia, Kelowna, BC, Canada
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Miyazaki A, Miki K, Maekura R, Tsujino K, Hashimoto H, Miki M, Yanagi H, Koba T, Nii T, Matsuki T, Kida H. Increased Oxygen Extraction by Pulmonary Rehabilitation Improves Exercise Tolerance and Ventilatory Efficiency in Advanced Chronic Obstructive Pulmonary Disease. J Clin Med 2022; 11:jcm11040963. [PMID: 35207235 PMCID: PMC8878603 DOI: 10.3390/jcm11040963] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 02/09/2022] [Accepted: 02/10/2022] [Indexed: 11/26/2022] Open
Abstract
Background: In cardiopulmonary exercise testing (CPET), oxygen uptake (V’O2) is calculated using the product of minute ventilation (V’E) and the difference between inspiratory and expiratory O2 concentrations (ΔFO2). However, little is known about the response of ΔFO2 to pulmonary rehabilitation (PR). The aim of the present study was (1) to investigate whether PR increases peak V’O2, based on whether ΔFO2 or V’E at peak exercise increase after PR, and (2) to investigate whether an improvement in ΔFO2 correlates with an improvement in ventilatory efficiency. Methods: A total of 38 patients with severe and very severe COPD, whose PR responses were evaluated by CPET, were retrospectively analyzed. Results: After PR, peak V’O2 was increased in 14 patients. The difference in ΔFO2 at peak exercise following PR correlated with the difference in peak V’O2 (r = 0.4884, p = 0.0019), the difference in V’E/V’CO2-nadir (r = −0.7057, p < 0.0001), and the difference in V’E–V’CO2 slope (r = −0.4578, p = 0.0039), but it did not correlate with the difference in peak V’E. Conclusions: The increased O2 extraction following PR correlated with improved exercise tolerance and ventilatory efficiency. In advanced COPD patients, a new strategy for improving O2 extraction ability might be effective in those in whom ventilatory ability can be only minimally increased.
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Affiliation(s)
- Akito Miyazaki
- Department of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka 560-8552, Japan; (A.M.); (K.T.); (H.H.); (T.K.); (T.N.); (T.M.); (H.K.)
| | - Keisuke Miki
- Department of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka 560-8552, Japan; (A.M.); (K.T.); (H.H.); (T.K.); (T.N.); (T.M.); (H.K.)
- Correspondence: ; Tel.: +81-6-6853-2001
| | - Ryoji Maekura
- Graduate School of Health Care Sciences, Jikei Institute, Osaka 532-0003, Japan;
| | - Kazuyuki Tsujino
- Department of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka 560-8552, Japan; (A.M.); (K.T.); (H.H.); (T.K.); (T.N.); (T.M.); (H.K.)
| | - Hisako Hashimoto
- Department of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka 560-8552, Japan; (A.M.); (K.T.); (H.H.); (T.K.); (T.N.); (T.M.); (H.K.)
| | - Mari Miki
- Department of Internal Medicine, Tokushima Prefecture Naruto Hospital, Naruto 772-8503, Japan;
| | - Hiromi Yanagi
- Department of Clinical Examination, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka 560-8552, Japan;
| | - Taro Koba
- Department of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka 560-8552, Japan; (A.M.); (K.T.); (H.H.); (T.K.); (T.N.); (T.M.); (H.K.)
| | - Takuro Nii
- Department of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka 560-8552, Japan; (A.M.); (K.T.); (H.H.); (T.K.); (T.N.); (T.M.); (H.K.)
| | - Takanori Matsuki
- Department of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka 560-8552, Japan; (A.M.); (K.T.); (H.H.); (T.K.); (T.N.); (T.M.); (H.K.)
| | - Hiroshi Kida
- Department of Respiratory Medicine, National Hospital Organization Osaka Toneyama Medical Center, Toyonaka 560-8552, Japan; (A.M.); (K.T.); (H.H.); (T.K.); (T.N.); (T.M.); (H.K.)
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Ade CJ, Turpin VRG, Parr SK, Hammond ST, White Z, Weber RE, Schulze KM, Colburn TD, Poole DC. Does wearing a facemask decrease arterial blood oxygenation and impair exercise tolerance? Respir Physiol Neurobiol 2021; 294:103765. [PMID: 34352384 PMCID: PMC9715989 DOI: 10.1016/j.resp.2021.103765] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/12/2021] [Accepted: 07/25/2021] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Concerns have been raised that COVID-19 face coverings compromise lung function and pulmonary gas exchange to the extent that they produce arterial hypoxemia and hypercapnia during high intensity exercise resulting in exercise intolerance in recreational exercisers. This study therefore aimed to investigate the effects of a surgical, flannel or vertical-fold N95 masks on cardiorespiratory responses to incremental exercise. METHODS This investigation studied 11 adult males and females at rest and while performing progressive cycle exercise to exhaustion. We tested the hypotheses that wearing a surgical (S), flannel (F) or horizontal-fold N95 mask compared to no mask (control) would not promote arterial deoxygenation or exercise intolerance nor alter primary cardiovascular variables during submaximal or maximal exercise. RESULTS Despite the masks significantly increasing end-expired peri-oral %CO2 and reducing %O2, each ∼0.8-2% during exercise (P < 0.05), our results supported the hypotheses. Specifically, none of these masks reduced sub-maximal or maximal exercise arterial O2 saturation (P = 0.744), but ratings of dyspnea were significantly increased (P = 0.007). Moreover, maximal exercise capacity was not compromised nor were there any significant alterations of primary cardiovascular responses (mean arterial pressure, stroke volume, cardiac output) found during sub-maximal exercise. CONCLUSION Whereas these results are for young healthy recreational male and female exercisers and cannot be applied directly to elite athletes, older or patient populations, they do support that arterial hypoxemia and exercise intolerance are not the obligatory consequences of COVID-19-indicated mask-wearing at least for cycling exercise.
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Affiliation(s)
- Carl J Ade
- Departments of Kinesiology, Kansas State University, Manhattan, KS, 66506, USA.
| | | | - Shannon K Parr
- Departments of Kinesiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Stephen T Hammond
- Departments of Kinesiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Zachary White
- Departments of Kinesiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Ramona E Weber
- Departments of Kinesiology, Kansas State University, Manhattan, KS, 66506, USA; Anatomy and Physiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Kiana M Schulze
- Departments of Kinesiology, Kansas State University, Manhattan, KS, 66506, USA; Anatomy and Physiology, Kansas State University, Manhattan, KS, 66506, USA
| | - Trenton D Colburn
- Departments of Kinesiology, Kansas State University, Manhattan, KS, 66506, USA; Anatomy and Physiology, Kansas State University, Manhattan, KS, 66506, USA
| | - David C Poole
- Departments of Kinesiology, Kansas State University, Manhattan, KS, 66506, USA; Anatomy and Physiology, Kansas State University, Manhattan, KS, 66506, USA
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Gonzalez-Garcia M, Barrero M, Maldonado D. Exercise Capacity, Ventilatory Response, and Gas Exchange in COPD Patients With Mild to Severe Obstruction Residing at High Altitude. Front Physiol 2021; 12:668144. [PMID: 34220533 PMCID: PMC8249805 DOI: 10.3389/fphys.2021.668144] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 04/28/2021] [Indexed: 01/04/2023] Open
Abstract
Background Exercise intolerance, desaturation, and dyspnea are common features in patients with chronic obstructive pulmonary disease (COPD). At altitude, the barometric pressure (BP) decreases, and therefore the inspired oxygen pressure and the partial pressure of arterial oxygen (PaO2) also decrease in healthy subjects and even more in patients with COPD. Most of the studies evaluating ventilation and arterial blood gas (ABG) during exercise in COPD patients have been conducted at sea level and in small populations of people ascending to high altitudes. Our objective was to compare exercise capacity, gas exchange, ventilatory alterations, and symptoms in COPD patients at the altitude of Bogotá (2,640 m), of all degrees of severity. Methods Measurement during a cardiopulmonary exercise test of oxygen consumption (VO2), minute ventilation (VE), tidal volume (VT), heart rate (HR), ventilatory equivalents of CO2 (VE/VCO2), inspiratory capacity (IC), end-tidal carbon dioxide tension (PETCO2), and ABG. For the comparison of the variables between the control subjects and the patients according to the GOLD stages, the non-parametric Kruskal–Wallis test or the one-way analysis of variance test was used. Results Eighty-one controls and 525 patients with COPD aged 67.5 ± 9.1 years were included. Compared with controls, COPD patients had lower VO2 and VE (p < 0.001) and higher VE/VCO2 (p = 0.001), A-aPO2, and VD/VT (p < 0.001). In COPD patients, PaO2 and saturation decreased, and delta IC (p = 0.004) and VT/IC increased (p = 0.002). These alterations were also seen in mild COPD and progressed with increasing severity of the obstruction. Conclusion The main findings of this study in COPD patients residing at high altitude were a progressive decrease in exercise capacity, increased dyspnea, dynamic hyperinflation, restrictive mechanical constraints, and gas exchange abnormalities during exercise, across GOLD stages 1–4. In patients with mild COPD, there were also lower exercise capacity and gas exchange alterations, with significant differences from controls. Compared with studies at sea level, because of the lower inspired oxygen pressure and the compensatory increase in ventilation, hypoxemia at rest and during exercise was more severe; PaCO2 and PETCO2 were lower; and VE/VO2 was higher.
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Affiliation(s)
- Mauricio Gonzalez-Garcia
- Pulmonary Function Testing Laboratory, Fundación Neumologica Colombiana, Bogotá, Colombia.,Faculty of Medicine, Universidad de La Sabana, Bogotá, Colombia
| | - Margarita Barrero
- Pulmonary Function Testing Laboratory, Fundación Neumologica Colombiana, Bogotá, Colombia
| | - Dario Maldonado
- Pulmonary Function Testing Laboratory, Fundación Neumologica Colombiana, Bogotá, Colombia
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Motor Pathophysiology Related to Dyspnea in COPD Evaluated by Cardiopulmonary Exercise Testing. Diagnostics (Basel) 2021; 11:diagnostics11020364. [PMID: 33670051 PMCID: PMC7926713 DOI: 10.3390/diagnostics11020364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/11/2021] [Accepted: 02/19/2021] [Indexed: 11/18/2022] Open
Abstract
In chronic obstructive pulmonary disease (COPD), exertional dyspnea, which increases with the disease’s progression, reduces exercise tolerance and limits physical activity, leading to a worsening prognosis. It is necessary to understand the diverse mechanisms of dyspnea and take appropriate measures to reduce exertional dyspnea, as COPD is a systemic disease with various comorbidities. A treatment focusing on the motor pathophysiology related to dyspnea may lead to improvements such as reducing dynamic lung hyperinflation, respiratory and metabolic acidosis, and eventually exertional dyspnea. However, without cardiopulmonary exercise testing (CPET), it may be difficult to understand the pathophysiological conditions during exercise. CPET facilitates understanding of the gas exchange and transport associated with respiration-circulation and even crosstalk with muscles, which is sometimes challenging, and provides information on COPD treatment strategies. For respiratory medicine department staff, CPET can play a significant role when treating patients with diseases that cause exertional dyspnea. This article outlines the advantages of using CPET to evaluate exertional dyspnea in patients with COPD.
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Boutou AK, Zafeiridis A, Pitsiou G, Dipla K, Kioumis I, Stanopoulos I. Cardiopulmonary exercise testing in chronic obstructive pulmonary disease: An update on its clinical value and applications. Clin Physiol Funct Imaging 2020; 40:197-206. [PMID: 32176429 DOI: 10.1111/cpf.12627] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 02/24/2020] [Accepted: 03/09/2020] [Indexed: 12/25/2022]
Abstract
Chronic obstructive pulmonary disease is a debilitating disorder, characterized by airflow limitation, exercise impairment, reduced functional capacity and significant systemic comorbidity, which complicates the course of the disease. The critical inspiratory constraint to tidal volume expansion during exercise (that may be further complicated by the presence of dynamic hyperinflation), abnormalities in oxygen transportation and gas exchange abnormalities are the major pathophysiological mechanisms of exercise intolerance in COPD patients, and thus, exercise testing has been traditionally used for the functional evaluation of these patients. Compared to various laboratory and field exercise tests, cardiopulmonary exercise testing (CPET) provides a thorough assessment of exercise physiology, involving the integrative respiratory, cardiovascular, muscle and metabolic responses to exercise. This review highlights the clinical utility of CPET in COPD patients, as it provides important information for the determination of the major factors that limit exercise among patients with several comorbidities, allows the assessment of the severity of dynamic hyperinflation, provides valuable prognostic information and can be used to evaluate the response to several therapeutic interventions.
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Affiliation(s)
- Afroditi K Boutou
- Department of Respiratory Medicine, "G. Papanikolaou" Hospital, Thessaloniki, Greece
| | - Antreas Zafeiridis
- Laboratory of Exercise Physiology and Biochemistry, Department of Physical Education and Sports Science at Serres, Aristotle University of Thessaloniki, Serres, Greece
| | - Georgia Pitsiou
- Respiratory Failure Department, "G. Papanikolaou" Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Konstantina Dipla
- Laboratory of Exercise Physiology and Biochemistry, Department of Physical Education and Sports Science at Serres, Aristotle University of Thessaloniki, Serres, Greece
| | - Ioannis Kioumis
- Respiratory Failure Department, "G. Papanikolaou" Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Ioannis Stanopoulos
- Respiratory Failure Department, "G. Papanikolaou" Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Abstract
Lung transplantation is a valuable therapeutic option for many patients with severe lung disease who have exhausted other medical or surgical therapies. However, since lungs are not a manufacturable organ like artificial heart valves or left ventricular assist devices, and since they are a limited resource compared to number of patients requiring the organs, the Department of Health and Human Services set the Final Rule of organ allocation in 1998. This led to development and implementation of Lung Allocation Score (LAS) in 2005. The score broadly divides lung diseases into 4 diagnostic criteria with a coefficient factor given to each category. The score is based on the prognostic factors of each patient to determine the risk of mortality without a transplant combined with the probability of patient survival post-transplant. Most of the guidelines for "Indications for referral and listing in lung transplant" is based on consensus opinion as there is limited amount of robust data and trials about this topic. The International Society for Heart and Lung Transplant (ISHLT) has published three editions for candidate selection and listing. In this article, we have attempted to highlight the guidelines and incorporated other disease specific prognostic factors that are not captured in the LAS. Ultimately, there are other factors like geographic location, height, blood group, preformed antibodies, transplant center experience, past wait times and transplant rate, availability of organs, etc., which also play a role especially when considering listing a patient for lung transplant. We also highlighted a representative disease in each category and most criteria for that disease will apply to other diseases in that category. Finally, this article does not delve into the history and reasoning behind each guideline but is meant to provide a general overview of indications and contraindications applicable in the field of adult lung transplantation.
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Affiliation(s)
- Omar Shweish
- Division of Pulmonary, Critical Care and Sleep Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Goutham Dronavalli
- Division of Pulmonary, Critical Care and Sleep Medicine, Baylor College of Medicine, Houston, TX, USA
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Kagawa H, Miki K, Kitada S, Miki M, Yoshimura K, Oshitani Y, Nishida K, Sawa N, Tsujino K, Maekura R. Dyspnea and the Varying Pathophysiologic Manifestations of Chronic Obstructive Pulmonary Disease Evaluated by Cardiopulmonary Exercise Testing With Arterial Blood Analysis. Front Physiol 2018; 9:1293. [PMID: 30333757 PMCID: PMC6176099 DOI: 10.3389/fphys.2018.01293] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/27/2018] [Indexed: 01/31/2023] Open
Abstract
Background: Patients with chronic obstructive pulmonary disease (COPD) show varying mechanisms of exertional dyspnea with different exercise capacities. Methods: To investigate the pathophysiologic conditions related to exertional dyspnea, 294 COPD patients were evaluated using cardiopulmonary exercise testing (CPET) with arterial blood analyses, with the patients classified into two groups according to their exercise limitation: the leg fatigue group (n = 58) and the dyspnea group (n = 215). The dyspnea group was further subdivided into four groups based on peak oxygen uptake ( V ° O 2 in mL/min/kg): group A (< 11), group B (11 to < 15), group C (15 to < 21), and group D (≥21). Results: In the dyspnea group, group A (n = 28) showed the following findings: (i) the forced expiratory volume in 1 s was not correlated with the peak V ° O 2 (p = 0.288), (ii) the arterial oxygen tension (PaO2) slope (peak minus resting PaO2/Δ V ° O 2 ) was the steepest (p < 0.0001) among all subgroups, (iii) reduced tidal volume (VT) was negatively correlated with respiratory frequency at peak exercise (p < 0.0001), and (iv) a break point in exertional VT curve was determined in 17 (61%) patients in group A. In these patients, there was a significant negative correlation between bicarbonate ion ( HCO 3 - ) levels at peak exercise and VT level when the VT-break point occurred (p = 0.032). In group D (n = 46), HCO 3 - levels were negatively correlated with plasma lactate levels (p < 0.0001). In all subgroups, the HCO 3 - level was negatively correlated with minute ventilation. The dyspnea subgroups showed no significant differences in the overall mean pH [7.363 (SD 0.039)] and Borg scale scores [7.4 (SD, 2.3)] at peak exercise. Conclusions: During exercise, ventilation is stimulated to avoid arterial blood acidosis and hypoxemia, but ventilatory stimulation is restricted in the setting of reduced respiratory system ability. These conditions provoke the exertional dyspnea in COPD. Although symptom levels were similar, the exertional pathophysiologic conditions differed according to residual exercise performance; moreover, COPD patients showed great inter-individual variability. An adequate understanding of individual pathophysiologic conditions using CPET is essential for proper management of COPD patients.
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Affiliation(s)
- Hiroyuki Kagawa
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan
| | - Keisuke Miki
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan
| | - Seigo Kitada
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan
| | - Mari Miki
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan
| | - Kenji Yoshimura
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan
| | - Yohei Oshitani
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan
| | - Kohei Nishida
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan
| | - Nobuhiko Sawa
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan
| | - Kazuyuki Tsujino
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan
| | - Ryoji Maekura
- Department of Respiratory Medicine, National Hospital Organization Toneyama National Hospital, Toyonaka,Japan.,Graduate School of Health Care Sciences, Jikei Institute, Osaka, Japan
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Guo L, Chughtai AR, Jiang H, Gao L, Yang Y, Yang Y, Liu Y, Xie Z, Li W. Relationship between polycythemia and in-hospital mortality in chronic obstructive pulmonary disease patients with low-risk pulmonary embolism. J Thorac Dis 2016; 8:3119-3131. [PMID: 28066591 DOI: 10.21037/jtd.2016.11.31] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUNDS Pulmonary embolism (PE) is frequent in subjects with chronic obstructive pulmonary disease (COPD) and associated with high mortality. This multi-center retrospective study was performed to investigate if secondary polycythemia is associated with in-hospital mortality in COPD patients with low-risk PE. METHODS We identified COPD patients with proven PE between October, 2005 and October, 2015. Patients in risk classes III-V on the basis of the PESI score were excluded. We extracted demographic, clinical and laboratory information at the time of admission from medical records. All subjects were followed until hospital discharge to identify all-cause mortality. RESULTS We enrolled 629 consecutive patients with COPD and PE at low risk: 132 of them (21.0%) with and 497 (79.0%) without secondary polycythemia. Compared with those without polycythemia, the polycythemia group had significantly lower forced expiratory volume in one second (FEV1) level (0.9±0.3 vs. 1.4±0.5, P=0.000), lower PaO2 and SpO2 as well as higher PaCO2 (P=0.03, P=0.03 and P=0.000, respectively). COPD patients with polycythemia had a higher proportion of arrhythmia in electrocardiogram (ECG) (49.5% vs. 35.7%, P=0.02), a longer hospital duration time (15.3±10.1 vs. 9.7±9.1, P=0.001), a higher mechanical ventilation rate (noninvasive and invasive, 51.7% vs. 30.3%, P=0.04 and 31.0% vs. 7.9%, P=0.04, respectively), and a higher in-hospital mortality (12.1% vs. 6.6%, P=0.04). Multivariate logistic regression analysis revealed that polycythemia was associated with mortality in COPD patients with low-risk PE (adjusted OR 1.11; 95% CI, 1.04-1.66). CONCLUSIONS Polycythemia is an independent risk factor for all-cause in-hospital mortality in COPD patients with PE at low risk.
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Affiliation(s)
- Lu Guo
- Department of Respiratory Medicine, West China Hospital of Sichuan University, Chengdu 610041, China;; Department of Respiratory Medicine, Sichuan Academy of Medical Science, Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology of China, Chengdu 610072, China
| | | | - Hongli Jiang
- Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Lingyun Gao
- Department of Respiratory Medicine, Sichuan Academy of Medical Science, Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology of China, Chengdu 610072, China
| | - Yan Yang
- Department of Respiratory Medicine, Sichuan Academy of Medical Science, Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology of China, Chengdu 610072, China
| | - Yang Yang
- Department of Respiratory Medicine, Sichuan Academy of Medical Science, Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology of China, Chengdu 610072, China
| | - Yuejian Liu
- Department of Respiratory Medicine, Sichuan Academy of Medical Science, Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology of China, Chengdu 610072, China
| | - Zhenliang Xie
- Department of Respiratory Medicine, Sichuan Academy of Medical Science, Sichuan Provincial People's Hospital, University Hospital of Electronic Science & Technology of China, Chengdu 610072, China
| | - Weimin Li
- Department of Respiratory Medicine, West China Hospital of Sichuan University, Chengdu 610041, China
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Lane CR, Tonelli AR. Lung transplantation in chronic obstructive pulmonary disease: patient selection and special considerations. Int J Chron Obstruct Pulmon Dis 2015; 10:2137-46. [PMID: 26491282 PMCID: PMC4608618 DOI: 10.2147/copd.s78677] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a leading cause of mortality and morbidity. Lung transplantation is one of the few treatments available for end-stage COPD with the potential to improve survival and quality of life. The selection of candidates and timing of listing present challenges, as COPD tends to progress fairly slowly, and survival after lung transplantation remains limited. Though the natural course of COPD is difficult to predict, the use of assessments of functional status and multivariable indices such as the BODE index can help identify which patients with COPD are at increased risk for mortality, and hence which are more likely to benefit from lung transplantation. Patients with COPD can undergo either single or bilateral lung transplantation. Although many studies suggest better long-term survival with bilateral lung transplant, especially in younger patients, this continues to be debated, and definitive recommendations about this cannot be made. Patients may be more susceptible to particular complications of transplant for COPD, including native lung hyperinflation, and development of lung cancer.
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Affiliation(s)
- C Randall Lane
- Respiratory Institute, Cleveland Clinic, Cleveland, OH, USA
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Greulich T, Koczulla AR, Nell C, Kehr K, Vogelmeier CF, Stojanovic D, Wittmann M, Schultz K. Effect of a Three-Week Inpatient Rehabilitation Program on 544 Consecutive Patients with Very Severe COPD: A Retrospective Analysis. Respiration 2015; 90:287-92. [DOI: 10.1159/000436979] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 06/15/2015] [Indexed: 11/19/2022] Open
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Maekura R, Hiraga T, Miki K, Kitada S, Miki M, Yoshimura K, Yamamoto H, Kawabe T, Mori M. Personalized pulmonary rehabilitation and occupational therapy based on cardiopulmonary exercise testing for patients with advanced chronic obstructive pulmonary disease. Int J Chron Obstruct Pulmon Dis 2015; 10:1787-800. [PMID: 26366071 PMCID: PMC4562755 DOI: 10.2147/copd.s86455] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Take-home summary Personalized pulmonary rehabilitation including occupational therapy improves the prognosis of patients with advanced COPD. Purpose We previously reported that patients with chronic obstructive pulmonary disease (COPD) exhibit three exercise-induced life-threatening conditions: hypoxemia, sympathetic overactivity, and respiratory acidosis. We aimed to verify whether mortality in patients with advanced COPD could be reduced by a personalized pulmonary rehabilitation (PPR) program in hospital, which determines individual safe ranges and includes occupational therapy (PPR-OT), to prevent desaturation and sympathetic nerve activation during daily activities. Patients and methods The novel PPR-OT program was evaluated in a retrospective study of patients with COPD (Global Initiative for Chronic Obstructive Lung Disease [GOLD] Grade D) who underwent cardiopulmonary exercise testing (CPET) between April 1990 and December 1999. They received regular treatment without the proposed therapy (control group: n=61; male-to-female ratio [M:F] =57:4; mean age: 68.5±6.7 years) or with the proposed therapy (PPR-OT group: n=46; M:F =44:2; mean age: 68.7±7.1 years). A prospective observational study included patients with COPD receiving home oxygen therapy (HOT) between April 1995 and March 2007 to compare the survival rates of the control group (n=47; M:F ratio =34:13; mean age: 71.3±10.0 years) and the PPR-OT group (n=85; M:F =78:7; mean age: 70.7±6.1 years) who completed the proposed therapy. Survival after CPET or HOT was analyzed using Cox proportional-hazards regression and Kaplan–Meier analyses. Results In both studies, the program significantly improved all-cause mortality (retrospective study: risk ratio =0.389 [range: 0.172–0.800]; P=0.0094; log-rank test, P=0.0094; observational study: risk ratio =0.515 [range: 0.296–0.933]; P=0.0291; log-rank test, P=0.0232]. At 5 years and 7 years, all-cause mortality was extremely low in patients in the PPR-OT group receiving HOT (18.8% and 28.2%, respectively), compared to that in the control group (34.0% and 44.7%, respectively). Survival of patients with life-threatening pathophysiological conditions also greatly improved. Conclusion The PPR-OT program improved the survival of patients with advanced COPD probably because it modified life-threatening conditions.
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Affiliation(s)
- Ryoji Maekura
- Department of Respiratory Medicine and Rehabilitation, National Hospital Organization Toneyama Hospital, Toyonaka City, Osaka, Japan
| | - Toru Hiraga
- Department of Respiratory Medicine and Rehabilitation, National Hospital Organization Toneyama Hospital, Toyonaka City, Osaka, Japan
| | - Keisuke Miki
- Department of Respiratory Medicine and Rehabilitation, National Hospital Organization Toneyama Hospital, Toyonaka City, Osaka, Japan
| | - Seigo Kitada
- Department of Respiratory Medicine and Rehabilitation, National Hospital Organization Toneyama Hospital, Toyonaka City, Osaka, Japan
| | - Mari Miki
- Department of Respiratory Medicine and Rehabilitation, National Hospital Organization Toneyama Hospital, Toyonaka City, Osaka, Japan
| | - Kenji Yoshimura
- Department of Respiratory Medicine and Rehabilitation, National Hospital Organization Toneyama Hospital, Toyonaka City, Osaka, Japan
| | - Hiroshi Yamamoto
- Department of Respiratory Medicine and Rehabilitation, National Hospital Organization Toneyama Hospital, Toyonaka City, Osaka, Japan
| | - Toshiko Kawabe
- Department of Respiratory Medicine and Rehabilitation, National Hospital Organization Toneyama Hospital, Toyonaka City, Osaka, Japan
| | - Masahide Mori
- Department of Respiratory Medicine and Rehabilitation, National Hospital Organization Toneyama Hospital, Toyonaka City, Osaka, Japan
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