Deconditioning does not explain orthostatic intolerance in ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome)

Autor: C. (Linda) M. C. van Campen, Peter C. Rowe, Frans C. Visser
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Journal of Translational Medicine, Vol 19, Iss 1, Pp 1-10 (2021)
Druh dokumentu: article
ISSN: 1479-5876
DOI: 10.1186/s12967-021-02819-0
Popis: Abstract Background Orthostatic intolerance (OI) is a frequent finding in individuals with myalgic encephalomyelitis /chronic fatigue syndrome (ME/CFS). Published studies have proposed that deconditioning is an important pathophysiological mechanism in various forms of OI, including postural orthostatic tachycardia syndrome (POTS), however conflicting opinions exist. Deconditioning can be classified objectively using the predicted peak oxygen consumption (VO2) values from cardiopulmonary exercise testing (CPET). Therefore, if deconditioning is an important contributor to OI symptomatology, one would expect a relation between the degree of reduction in peak VO2during CPET and the degree of reduction in CBF during head-up tilt testing (HUT). Methods and results In 22 healthy controls and 199 ME/CFS patients were included. Deconditioning was classified by the CPET response as follows: %peak VO2 ≥ 85% = no deconditioning, %peak VO2 65–85% = mild deconditioning, and %peak VO2
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