Naschitz, J E, Rosner, I, Rozenbaum, M et al. · Seminars in arthritis and rheumatism · 2000 · DOI
This study tested whether a special tilt table test that measures blood pressure, heart rate, breathing, and carbon dioxide levels could help diagnose ME/CFS. Researchers compared 32 ME/CFS patients to 32 healthy people during this test. ME/CFS patients showed abnormal responses—like drops in blood pressure, increases in heart rate, faster breathing, and lower carbon dioxide levels—while healthy people did not, suggesting this test might help identify ME/CFS.
Objective biomarkers for ME/CFS diagnosis remain elusive; this study suggests CHUTT may provide measurable physiological evidence to support clinical diagnosis and reduce reliance on subjective symptom assessment. The findings support the hypothesis that autonomic nervous system dysfunction is a central pathophysiological feature of ME/CFS, which could guide future research into mechanism-based treatments.
This study does not prove that autonomic dysfunction causes ME/CFS—only that it is associated with the condition. The cross-sectional design cannot establish causality or determine whether these abnormalities are primary disease features or secondary consequences. The study does not demonstrate that CHUTT testing can predict prognosis or treatment response.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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