Assessment of Autonomic Nervous System Function in Patients with Chronic Fatigue Syndrome and Post-COVID-19 Syndrome Presenting with Recurrent Syncope.
Milovanovic, Branislav, Markovic, Nikola, Petrovic, Masa et al.·Journal of clinical medicine·2025
This study examined how the autonomic nervous system (the part that controls heart rate, blood pressure, and other automatic functions) works differently in people with ME/CFS compared to healthy people. Researchers tested 440 people, including those with ME/CFS from unknown causes and those whose ME/CFS developed after COVID-19, using heart and blood pressure monitoring tests. They found that both ME/CFS groups had significant problems with autonomic function and experienced fainting or near-fainting episodes at high rates, though the post-COVID group showed somewhat different patterns.