Nelson, Maximillian J, Bahl, Jasvir S, Buckley, Jonathan D et al. · Medicine · 2019 · DOI
This study looked at how the hearts of people with ME/CFS respond differently compared to healthy people, focusing on heart rate and its patterns. Researchers reviewed 64 previous studies and found that ME/CFS patients tend to have higher resting heart rates, unusual heart rate responses to position changes, and different patterns in heart rate variability (the natural variation in time between heartbeats). These findings suggest that the nervous system that controls heart function may work differently in people with ME/CFS.
These findings provide objective, quantifiable evidence that autonomic nervous system dysfunction is present in ME/CFS, which could support diagnosis and help validate the biological basis of the condition. Understanding these cardiac autonomic alterations may inform treatment strategies and help distinguish ME/CFS from other conditions with similar symptoms.
This study does not prove that autonomic dysfunction causes ME/CFS or that it is the primary mechanism underlying the condition—it only shows an association. The findings are based on compiled existing research with varying methodologies, so they cannot establish whether these cardiac changes are specific to ME/CFS or present in other conditions. Additionally, altered heart rate parameters may be a symptom of the condition rather than a cause.
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 →
Contribute
Private, reviewed by a human. Not a public comment thread.