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Lookup NU author(s): Dr Gavin Spickett, Emerita Professor Julia Newton
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Background: It has been suggested that postural orthostatic tachycardia syndrome (POTS) be considered in the differential diagnosis of those with chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME). Currently, measurement of haemodynamic response to standing is not recommended in the UK NICE CFS/ME guidelines. Objectives: To determine prevalence of POTS in patients with CFS/ME. Design: Observational cohort study. Methods: Fifty-nine patients with CFS/ME (Fukuda criteria) and 52 age- and sex-matched controls underwent formal autonomic assessment in the cardiovascular laboratory with continuous heart rate and beat-to-beat blood pressure measurement (Task Force, CNSystems, Graz Austria). Haemodynamic responses to standing over 2 min were measured. POTS was defined as symptoms of orthostatic intolerance associated with an increase in heart rate from the supine to upright position of >30 beats per minute or to a heart rate of >120 beats per minute on standing. Results: Maximum heart rate on standing was significantly higher in the CFS/ME group compared with controls (106 ± 20 vs. 98 ± 13; P = 0.02). Of the CFS/ME group, 27% (16/59) had POTS compared with 9% (5) in the control population (P = 0.006). This difference was predominantly related to the increased proportion of those in the CFS/ME group whose heart rate increased to >120 beats per minute on standing (P = 0.0002). Increasing fatigue was associated with increase in heart rate (P = 0.04; r2 = 0.1). Conclusions: POTS is a frequent finding in patients with CFS/ME. We suggest that clinical evaluation of patients with CFS/ME should include response to standing. Studies are needed to determine the optimum intervention strategy to manage POTS in those with CFS/ME. © The Author 2008. Published by Oxford University Press on behalf of the Association of Physicians. All rights reserved.
Author(s): Hoad A, Spickett G, Elliott J, Newton J
Publication type: Article
Publication status: Published
Journal: QJM: An International Journal of Medicine
Year: 2008
Volume: 101
Issue: 12
Pages: 961-965
ISSN (print): 1460-2725
ISSN (electronic): 1460-2393
Publisher: Oxford University Press
URL: http://dx.doi.org/10.1093/qjmed/hcn123
DOI: 10.1093/qjmed/hcn123
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