Prevalence of autonomic dysfunction in hospitalized patients with Guillain-Barré syndrome.

INTRODUCTION: There is a paucity of data regarding autonomic dysfunction (AD) in Guillain-Barré Syndrome (GBS). Concern exists regarding inpatient mortality risk in GBS. We sought to identify the prevalence of AD in GBS inpatients.

METHODS: We used the Health Cost and Utilization Project Nationwide Inpatient Sample (NIS). GBS hospitalizations were identified by International Classification of Diseases, Ninth Revision, Clinical Modification code-357.0. Non-GBS hospitalizations were matched to these cases 4:1 by age and gender.

RESULTS: We identified 2,587 GBS patients and a control population of 10,348 patients during 2010-2011. The most common manifestations of AD were: diarrhea/constipation (15.5%), hyponatremia (14.9%), syndrome of inappropriate antidiuretic hormone secretion (SIADH) (4.8%), bradycardia (4.7%), and urinary retention (3.9%). GBS patients had higher rates of reversible cardiomyopathy, syncope, tachycardia, and Horner syndrome (P < 0.0001).

CONCLUSIONS: AD most commonly manifests as diarrhea/constipation, SIADH/hyponatremia, and cardiac dysfunction. This report can help increase awareness of AD in GBS and aid in early identification, treatment, and mortality reduction. Muscle Nerve 56: 331-333, 2017.