1
|
Powell TA, Mysliwiec V, Brock MS, Morris MJ. OSA and cardiorespiratory fitness: a review. J Clin Sleep Med 2022; 18:279-288. [PMID: 34437054 PMCID: PMC8807904 DOI: 10.5664/jcsm.9628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The effects of untreated obstructive sleep apnea (OSA) on cardiopulmonary function remain unclear. Cardiorespiratory fitness (CRF), commonly reflected by VO2 max measured during cardiopulmonary exercise testing, has gained popularity in evaluating numerous cardiopulmonary conditions and may provide a novel means of identifying OSA patients with the most clinically significant disease. This emerging testing modality provides simultaneous assessment of respiratory and cardiovascular function with results helping uncover evidence of evolving pathology in either organ system. In this review, we highlight the current state of the literature in regard to OSA and CRF with a specific focus on changes in cardiovascular function that have been previously noted. While OSA does not appear to limit respiratory function during exercise, studies seem to suggest an abnormal cardiovascular exercise response in this population including decreased cardiac output, a blunted heart rate response (ie, chronotropic incompetence), and exaggerated blood pressure response. Surprisingly, despite these observed changes in the cardiovascular response to exercise, results involving VO2 max in OSA remain inconclusive. This is reflected by VO2 max studies involving middle-aged OSA patients showing both normal and reduced CRF. As prior studies have not extensively characterized oxygen desaturation burden, we propose that reductions in VO2 max may exist in OSA patients with only the most significant disease (as reflected by nocturnal hypoxia). Further characterizing this relationship remains important as some research suggests that positive airway pressure therapy or aerobic exercise may improve CRF in patients with OSA. In conclusion, while it likely that severe OSA, via an abnormal cardiovascular response to exercise, is associated with decreased CRF, further study is clearly warranted to include determining if OSA with decreased CRF is associated with increased morbidity or mortality. CITATION Powell TA, Mysliwiec V, Brock MS, Morris MJ. OSA and cardiorespiratory fitness: a review. J Clin Sleep Med. 2022;18(1):279-288.
Collapse
Affiliation(s)
- Tyler A. Powell
- Sleep Medicine Service, Wilford Hall Ambulatory Surgery Center, JBSA Lackland Air Force Base, Texas,Address correspondence to: Tyler A. Powell, MD, Sleep Medicine Service, Wilford Hall Ambulatory Service Center, JBSA Lackland Air Force Base, TX 78234; ,
| | - Vincent Mysliwiec
- Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Matthew S. Brock
- Sleep Medicine Service, Wilford Hall Ambulatory Surgery Center, JBSA Lackland Air Force Base, Texas
| | - Michael J. Morris
- Graduate Medical Education, Brooke Army Medical Center, JBSA Fort Sam Houston, Texas
| |
Collapse
|
2
|
Wadey CA, Weston ME, Dorobantu DM, Pieles GE, Stuart G, Barker AR, Taylor RS, Williams CA. The role of cardiopulmonary exercise testing in predicting mortality and morbidity in people with congenital heart disease: a systematic review and meta-analysis. Eur J Prev Cardiol 2021; 29:513-533. [PMID: 34405863 DOI: 10.1093/eurjpc/zwab125] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/10/2021] [Indexed: 12/16/2022]
Abstract
AIMS The role of cardiopulmonary exercise testing (CPET) in predicting major adverse cardiovascular events (MACE) in people with congenital heart disease (ConHD) is unknown. A systematic review with meta-analysis was conducted to report the associations between CPET parameters and MACE in people with ConHD. METHODS AND RESULTS Electronic databases were systematically searched on 30 April 2020 for eligible publications. Two authors independently screened publications for inclusion, extracted study data, and performed risk of bias assessment. Primary meta-analysis pooled univariate hazard ratios across studies. A total of 34 studies (18 335 participants; 26.2 ± 10.1 years; 54% ± 16% male) were pooled into a meta-analysis. More than 20 different CPET prognostic factors were reported across 6 ConHD types. Of the 34 studies included in the meta-analysis, 10 (29%), 23 (68%), and 1 (3%) were judged as a low, medium, and high risk of bias, respectively. Primary univariate meta-analysis showed consistent evidence that improved peak and submaximal CPET measures are associated with a reduce risk of MACE. This association was supported by a secondary meta-analysis of multivariate estimates and individual studies that could not be numerically pooled. CONCLUSION Various maximal and submaximal CPET measures are prognostic of MACE across a variety of ConHD diagnoses. Further well-conducted prospective multicentre cohort studies are needed to confirm these findings.
Collapse
Affiliation(s)
- Curtis A Wadey
- Children's Health & Exercise Research Centre (CHERC), College of Life and Environmental Sciences, St. Luke's Campus, University of Exeter, Heavitree Road, Exeter EX1 2LU, UK
| | - Max E Weston
- Children's Health & Exercise Research Centre (CHERC), College of Life and Environmental Sciences, St. Luke's Campus, University of Exeter, Heavitree Road, Exeter EX1 2LU, UK.,School of Human Movement and Nutrition Sciences, Human Movement Studies Building, University of Queensland, QLD 4067, Brisbane, Australia
| | - Dan Mihai Dorobantu
- Children's Health & Exercise Research Centre (CHERC), College of Life and Environmental Sciences, St. Luke's Campus, University of Exeter, Heavitree Road, Exeter EX1 2LU, UK.,School of Population Health Sciences, University of Bristol, BS8 1QU, Bristol, UK
| | - Guido E Pieles
- National Institute for Health Research (NIHR) Cardiovascular Biomedical Research Centre, Bristol Heart Institute, Terrell St, BS2 8ED, Bristol, UK.,Bristol Congenital Heart Centre, The Bristol Heart Institute, University Hospitals Bristol NHS Foundation Trust, Upper Maudlin Street, BS2 8HW, Bristol, UK.,Institute of Sport Exercise and Health (ISEH), University College London, 170 Tottenham Court Rd, W1T 7HA, London, UK
| | - Graham Stuart
- National Institute for Health Research (NIHR) Cardiovascular Biomedical Research Centre, Bristol Heart Institute, Terrell St, BS2 8ED, Bristol, UK.,Bristol Congenital Heart Centre, The Bristol Heart Institute, University Hospitals Bristol NHS Foundation Trust, Upper Maudlin Street, BS2 8HW, Bristol, UK
| | - Alan R Barker
- Children's Health & Exercise Research Centre (CHERC), College of Life and Environmental Sciences, St. Luke's Campus, University of Exeter, Heavitree Road, Exeter EX1 2LU, UK
| | - Rod S Taylor
- MRC/CSO Social and Public Health Sciences Unit & Robertson Centre for Biostatistics, Institute of Health and Well Being, University of Glasgow, 99 Berkeley Street, G3 7HR, Glasgow, UK
| | - Craig A Williams
- Children's Health & Exercise Research Centre (CHERC), College of Life and Environmental Sciences, St. Luke's Campus, University of Exeter, Heavitree Road, Exeter EX1 2LU, UK
| |
Collapse
|