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Helt TW, Christensen J, Berg RMG, Lund TK, Kalhauge A, Rönsholt F, Podlekareva D, Arndal E, Madsen F, Munkholm M, Hanel B, Lebech AM, Katzenstein TL, Mortensen J. Maximal respiratory pressure after COVID-19 compared with reference material in healthy adults: A prospective cohort study (The SECURe study). Physiol Rep 2024; 12:e16184. [PMID: 39245803 DOI: 10.14814/phy2.16184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 07/09/2024] [Accepted: 08/02/2024] [Indexed: 09/10/2024] Open
Abstract
After COVID-19 long term respiratory symptoms and reduced lung function including maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) have been reported. However, no studies have looked at MIP and MEP in all disease groups and the reference materials collection methods differ substantially. We aimed to determine MIP and MEP in individuals after COVID-19 infection with different disease severity using reference material of healthy control group obtained using the same standardized method. Patients with COVID-19 were included March 2020-March 2021 at Rigshospitalet, Denmark. MIP and MEP were measured using microRPM. Predicted MIP and MEP were calculated using reference material obtained from 298 healthy adults aged 18-97 years using the same method. In SECURe, 145 participants were measured median 5 months after COVID-19 diagnosis and of these 16% had reduced MIP and/or MEP. There was reduced spirometry and total lung capacity, but not reduced diffusion capacity in those with abnormal MIP and/or MEP compared with normal MIP and MEP. Of those with reduced MIP and/or MEP at 5 months, 80% still had reduced MIP and/or MEP at 12 months follow-up. In conclusion, few have reduced MIP and/or MEP 5 months after COVID-19 and little improvement was seen over time.
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Affiliation(s)
- Thora Wesenberg Helt
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Jan Christensen
- Department of Occupational Therapy and Physiotherapy, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Ronan M G Berg
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Center for Physical Activity Research, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Thomas Kromann Lund
- Department of Cardiology, Section for Lung Transplantation, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Anna Kalhauge
- Department of Radiology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Frederikke Rönsholt
- Department of Cardiology, Section for Lung Transplantation, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Infectious Diseases, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Daria Podlekareva
- Department of Infectious Diseases, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Elisabeth Arndal
- Department of Otorhinolaryngology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Flemming Madsen
- Center for Clinical Research and Prevention, Copenhagen University Hospital-Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Mathias Munkholm
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Birgitte Hanel
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Anne-Mette Lebech
- Department of Infectious Diseases, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Terese Lea Katzenstein
- Department of Infectious Diseases, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
| | - Jann Mortensen
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Lytzen AA, Helt TW, Christensen J, Lund TK, Kalhauge A, Rönsholt FF, Podlekavera D, Arndal E, Lebech A, Hanel B, Katzenstein TL, Berg RMG, Mortensen J. Pulmonary diffusing capacity for carbon monoxide and nitric oxide after COVID-19: A prospective cohort study (the SECURe study). Exp Physiol 2024; 109:652-661. [PMID: 38532277 PMCID: PMC11061629 DOI: 10.1113/ep091757] [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] [Received: 01/05/2024] [Accepted: 02/27/2024] [Indexed: 03/28/2024]
Abstract
Many patients exhibit persistently reduced pulmonary diffusing capacity after coronavirus disease 2019 (COVID-19). In this study, dual test gas diffusing capacity for carbon monoxide and nitric oxide (DL,CO,NO) metrics and their relationship to disease severity and physical performance were examined in patients who previously had COVID-19. An initial cohort of 148 patients diagnosed with COVID-19 of all severities between March 2020 and March 2021 had a DL,CO,NO measurement performed using the single-breath method at 5.7 months follow-up. All patients with at least one abnormal DL,CO,NO metric (n = 87) were revaluated at 12.5 months follow-up. The DL,CO,NO was used to provide the pulmonary diffusing capacity for nitric oxide (DL,NO), the pulmonary diffusing capacity for carbon monoxide (DL,CO,5s), the alveolar-capillary membrane diffusing capacity and the pulmonary capillary blood volume. At both 5.7 and 12.5 months, physical performance was assessed using a 30 s sit-to-stand test and the 6 min walk test. Approximately 60% of patients exhibited a severity-dependent decline in at least one DL,CO,NO metric at 5.7 months follow-up. At 12.5 months, both DL,NO and DL,CO,5s had returned towards normal but still remained abnormal in two-thirds of the patients. Concurrently, improvements in physical performance were observed, but with no apparent relationship to any DL,CO,NO metric. The severity-dependent decline in DL,NO and DL,CO observed at 5.7 months after COVID-19 appears to be reduced consistently at 12.5 months follow-up in the majority of patients, despite marked improvements in physical performance.
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Affiliation(s)
- Anna Agnes Lytzen
- Centre for Physical Activity ResearchCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
| | - Thora Wesenberg Helt
- Department of Clinical Physiology and Nuclear MedicineCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
| | - Jan Christensen
- Department of Occupational Therapy and PhysiotherapyCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
| | - Thomas Kromann Lund
- Department of Cardiology, Section for Lung TransplantationCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
| | - Anna Kalhauge
- Department of RadiologyCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
| | | | - Daria Podlekavera
- Department of Respiratory Medicine and Infectious DiseasesCopenhagen University Hospital—Bispebjerg HospitalCopenhagenDenmark
| | - Elisabeth Arndal
- Department of OtorhinolaryngologyCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
| | - Anne‐Mette Lebech
- Department of Infectious DiseasesCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
| | - Birgitte Hanel
- Department of Clinical Physiology and Nuclear MedicineCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
| | - Terese L. Katzenstein
- Department of Infectious DiseasesCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
| | - Ronan M. G. Berg
- Centre for Physical Activity ResearchCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
- Department of Clinical Physiology and Nuclear MedicineCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
- Department of Biomedical Sciences, Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
- Neurovascular Research Laboratory, Faculty of Life Sciences and EducationUniversity of South WalesPontypriddUK
| | - Jann Mortensen
- Department of Clinical Physiology and Nuclear MedicineCopenhagen University Hospital—RigshospitaletCopenhagenDenmark
- Department of MedicineThe National HospitalTorshavnFaroe Islands
- Department of Clinical Medicine, Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
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de Nijs R, Berg RMG, Lindskov Hansen S, Mortensen J. Ventilation perfusion functional difference images in lung SPECT: A linear and symmetrical scale as an alternative to the ventilation perfusion ratio. Phys Med 2024; 119:103306. [PMID: 38335743 DOI: 10.1016/j.ejmp.2024.103306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 01/25/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024] Open
Abstract
PURPOSE Ventilation Perfusion SPECT is important in the diagnostics of e.g. pulmonary embolism and chronic obstructive pulmonary disease. Classical and reverse mismatched defects can be identified by utilizing the ventilation-perfusion ratio. Unfortunately, this ratio is only linear in the ventilation, the scale is not symmetrical regarding classical and reversed mismatches and small perfusion values give rise to artifacts. The ventilation-perfusion (VQ) difference is developed as an alternative. METHODS For both VQ-ratio and VQ-difference a scaling factor for the perfusion is computed, so that voxels with matched ventilation and perfusion (on average) yield zero signal. The relative VQ-difference is calculated by scaling with the summed VQ-signal in each voxel. The scaled VQ-difference is calculated by scaling with the global maximum of this sum. RESULTS The relative and scaled differences have a scale from -1 (perfusion only) to + 1 (ventilation only). Image quality of relative VQ-difference and VQ-ratio images is hampered by artifacts from areas with both low perfusion and low ventilation. Ratio and differences have been investigated in ten patients and are shown for three patients (one without defects). Clinical thresholds for the difference images are derived resulting in color maps of relevant (reversed) mismatches with a (reciprocal) ratio larger than two. CONCLUSIONS The relative ventilation-perfusion difference is a methodological improvement on the ventilation-perfusion ratio, because it has a symmetrical scale and is bound on a closed domain. A better diagnostic value is expected by utilizing the scaled difference, which represents functional difference instead of relative difference.
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Affiliation(s)
- Robin de Nijs
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
| | - Ronan M G Berg
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Center for Physical Activity Research, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Sofie Lindskov Hansen
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - Jann Mortensen
- Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; Department of Medicine, The National Hospital, Torshavn, Faroe Islands
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Fedorowski A, Olsén MF, Nikesjö F, Janson C, Bruchfeld J, Lerm M, Hedman K. Cardiorespiratory dysautonomia in post-COVID-19 condition: Manifestations, mechanisms and management. J Intern Med 2023; 294:548-562. [PMID: 37183186 DOI: 10.1111/joim.13652] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A significant proportion of COVID-19 patients experience debilitating symptoms for months after the acute infection. According to recent estimates, approximately 1 out of 10 COVID-19 convalescents reports persistent health issues more than 3 months after initial recovery. This 'post-COVID-19 condition' may include a large variety of symptoms from almost all domains and organs, and for some patients it may mean prolonged sick-leave, homestay and strongly limited activities of daily life. In this narrative review, we focus on the symptoms and signs of post-COVID-19 condition in adults - particularly those associated with cardiovascular and respiratory systems, such as postural orthostatic tachycardia syndrome or airway disorders - and explore the evidence for chronic autonomic dysfunction as a potential underlying mechanism. The most plausible hypotheses regarding cellular and molecular mechanisms behind the wide spectrum of observed symptoms - such as lingering viruses, persistent inflammation, impairment in oxygen sensing systems and circulating antibodies directed to blood pressure regulatory components - are discussed. In addition, an overview of currently available pharmacological and non-pharmacological treatment options is presented.
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Affiliation(s)
- Artur Fedorowski
- Department of Clinical Sciences, Lund University, Malmö, Sweden
- Department of Cardiology, Karolinska University Hospital, Solna, Sweden
- Department of Medicine, Karolinska Institute, Stockholm, Sweden
| | - Monika Fagevik Olsén
- Department of Occupational Therapy and Physiotherapy, Sahlgrenska University Hospital, Gothenburg, Sweden
- Department of Health and Rehabilitation/Physiotherapy, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Frida Nikesjö
- Department of Respiratory Medicine in Linköping, and Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Christer Janson
- Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Judith Bruchfeld
- Department of Infectious Diseases, Karolinska University Hospital, Stockholm, Sweden
- Division of Infectious Diseases, Department of Medicine, Solna, Karolinska Institute, Stockholm, Sweden
| | - Maria Lerm
- Department of Biomedical and Clinical Sciences, Division of Inflammation and Infection, Linköping University, Linköping, Sweden
| | - Kristofer Hedman
- Department of Clinical Physiology in Linköping, and Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
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