Pattern of Autonomic Involvement in Adult Patients with Guillain Barre Syndrome in a Tertiary Hospital

Background: Guillain Barre Syndrome (GBS) is an acute post infectious immune mediated peripheral neuropathy with a marked variation in pathology, clinical presentation and prognosis. Autonomic dysfunction is one of the important manifestations of GBS which may lead to significant morbidity and mortality. Objective: The aim of the study is to assess the autonomic involvement, to determine its frequency and pattern of involvement in adult patients with GBS Methods: An observational, descriptive, cross sectional study was carried out in the Department of Neurology, BSMMU, Dhaka from March, 2015 to September, 2017. Total 43 patients of GBS and 35 apparently healthy controls were recruited as the study population. On the basis of nerve conduction study patients were classified into different groups: acute inflammatory demyelinating polyneuropathy (AIDP), acute motor axonal neuropathy (AMAN) and acute motor sensory axonal neuropathy (AMSAN) and other variants. Disability status at the time of autonomic testing was measured by Hughes functional grading scale. The following tests of autonomic nervous system were performed in both patients and controls 1) resting heart rate and heart rate on changing posture (30: 15 ratio) 2) supine blood pressure and blood pressure on changing posture 3) heart rate response to valsalva maneuver 4) heart rate response to deep breathing and E: I ratio 5) sphincter disturbance by symptoms questionnaire. Results: The mean age of patients was 35±12 years (range18 to 65 years) and 58.1% were male. Around 88.4 % of patients showed some sort of autonomic dysfunction. Variation of heart rate by different maneuver like posture change, deep breathing and valsalva maneuver was found commonly. Among them 30:15 ratio was abnormal in majority of the patients (82.4%) followed by abnormal max-min HR/min (58.1%) and abnormal valsalva ratio (37.2%). Other abnormalities were postural hypotension (38.2%), sinus tachycardia (25.6%), hypertension (16.3%), hypotension (2.7%), sinus arrhythmia (4.7%), constipation (30%), urinary retention (7%) and urinary incontinence (4.7%). Conclusion: In this study different patterns of autonomic dysfunction was found in 88.4% of patients with GBS involving both sympathetic and parasympathetic components. The present study found no significant association between autonomic dysfunction and motor disability scores. Thus autonomic function assessment is essential in every patient with GBS in addition to motor & sensory function. Bangladesh Medical Res Counc Bull 2022; 48(3): 174-179