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BACKGROUND: Post-ganglionic sudomotor abnormalities are common in Parkinson's disease (PD), however data in clinically isolated REM sleep behavior disorder (iRBD) are limited.OBJECTIVE: To determine the prevalence of sudomotor abnormalities in a cohort of patients with iRBD.METHODS: We performed a retrospective review of patients seen in our autonomic clinic who underwent testing with the quantitative sudomotor axon reflex test (QSART). We identified three groups for comparison: 1.) iRBD, 2.) PD with RBD (PDwRBD) 3.) PD without RBD (PDwoRBD).RESULTS: PDwRBD (n=27) patients demonstrated the greatest sudomotor abnormalities (sudomotor CASS 1.44±1.24), followed by PDwoRBD (n=23, 0.57±0.5) and iRBD (n=20, 0.55±0.94) (p=0.015). Twenty percent of patients with iRBD had an abnormal result, compared to 67% PDwRBD and 35% PDwoRBD.DISCUSSION: Sudomotor abnormalities are common in patients with iRBD, supporting the concept that peripheral autonomic impairment occurs early in the course of disease.
View details for DOI 10.1016/j.autneu.2020.102645
View details for PubMedID 32062418