Assessment of Autonomic Nervous System Function in Patients with Chronic Fatigue Syndrome and Post-COVID-19 Syndrome Presenting with Recurrent Syncope.

ABSTRACT: Background/Objectives: Chronic fatigue syndrome and post-COVID-19 syndrome are associated with dysfunction of the autonomic nervous system, which may manifest as syncope and orthostatic intolerance. This study aimed to compare autonomic nervous system function in patients with chronic fatigue syndrome of unknown etiology and those with chronic fatigue syndrome secondary to post-COVID-19 syndrome using multiple diagnostic modalities, and to assess the prevalence and characteristics of syncope in these populations. Methods: This cross-sectional study included 440 patients examined at the Neurocardiological Laboratory of the Institute for Cardiovascular Diseases "Dedinje". Patients were divided into three groups: chronic fatigue syndrome of unknown etiology (Group 1, n = 210), c

SUBMITTER: Milovanovic B 

PROVIDER: S-EPMC11818862 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature