Background: Electromyography and nerve conduction studies (EMG-NCS) often yield nonspecific findings during the early stage of Guillain-Barré syndrome (GBS). Although useful for diagnosis, EMG-NCS are traditionally of little value in predicting a complicated clinical course, which is critical for timely decisions to initiate immunomodulatory treatment. We aimed to identify the early clinical and electrophysiologic predictors of respiratory failure, a prolonged hospital stay, and moderate-to-severe disability at discharge in GBS. Methods: We retrospectively analyzed the clinical and electrophysiologic data of adult GBS patients who were hospitalized during the early course of the disease (<2 weeks from symptom onset). Results: Eighty-one patients aged 47.5 ± 16.1 years were analyzed. The most common clinical variants were Miller-Fisher syndrome (30.9%) and classic sensorimotor GBS (25.9%). The clinical variant was not predictive of a complicated clinical course. Instead, specific clinical features such as dysautonomia (p = 0.006) and marked motor deficits (p = 0.002) were predictive of the primary composite outcome of respiratory failure and/or a prolonged hospital stay, with dysautonomia (p = 0.035) also predictive of moderate-to-severe disability at discharge. The most common abnormalities in EMG-NCS were bilateral absence of the H-reflex (86.4%) and F-wave abnormalities (44.4%). The presence of F-wave abnormalities was predictive of both respiratory failure (p = 0.032) and a prolonged hospital stay (p = 0.001). Conclusions Early F-wave abnormalities in GBS may serve as an electrophysiologic predictor of a complicated clinical course, suggesting that EMG-NCS can provide prognostic information to guide treatment decisions during the early stage of the disease.

Background: Alpha coma and its variants theta coma and alpha-theta coma (ATC) are clinical coma states characterized by electroencephalographic patterns resembling those of wakefulness. The complete (unreactive) form of these states is invariably associated with poor outcomes among post-anoxic comatose patients.Case Report: Herein, we present three adult comatose patients (aged 21, 45, and 51 years) with unreactive ATC patterns, who exhibited remarkable neurological improvement. Two patients experienced post-cardiopulmonary arrest (due to electrocution and viral myocarditis, respectively), while the third had severe septic encephalopathy. Electroencephalograms (EEGs) taken at least 24 hours after coma onset revealed unreactive ATC patterns. All patients survived, achieving significant neurological improvement. Remarkably, in one patient, the only symptom was minor incoordination during ambulation upon discharge. Conclusion These cases challenge the grave prognosis associated with this EEG pattern, particularly in post-anoxic comatose patients. Factors such as younger age, presence of shockable rhythms, and cause of arrest may have contributed to these favorable outcomes.

Background: Alpha coma and its variants theta coma and alpha-theta coma (ATC) are clinical coma states characterized by electroencephalographic patterns resembling those of wakefulness. The complete (unreactive) form of these states is invariably associated with poor outcomes among post-anoxic comatose patients.Case Report: Herein, we present three adult comatose patients (aged 21, 45, and 51 years) with unreactive ATC patterns, who exhibited remarkable neurological improvement. Two patients experienced post-cardiopulmonary arrest (due to electrocution and viral myocarditis, respectively), while the third had severe septic encephalopathy. Electroencephalograms (EEGs) taken at least 24 hours after coma onset revealed unreactive ATC patterns. All patients survived, achieving significant neurological improvement. Remarkably, in one patient, the only symptom was minor incoordination during ambulation upon discharge. Conclusion These cases challenge the grave prognosis associated with this EEG pattern, particularly in post-anoxic comatose patients. Factors such as younger age, presence of shockable rhythms, and cause of arrest may have contributed to these favorable outcomes.

Background: Alpha coma and its variants theta coma and alpha-theta coma (ATC) are clinical coma states characterized by electroencephalographic patterns resembling those of wakefulness. The complete (unreactive) form of these states is invariably associated with poor outcomes among post-anoxic comatose patients.Case Report: Herein, we present three adult comatose patients (aged 21, 45, and 51 years) with unreactive ATC patterns, who exhibited remarkable neurological improvement. Two patients experienced post-cardiopulmonary arrest (due to electrocution and viral myocarditis, respectively), while the third had severe septic encephalopathy. Electroencephalograms (EEGs) taken at least 24 hours after coma onset revealed unreactive ATC patterns. All patients survived, achieving significant neurological improvement. Remarkably, in one patient, the only symptom was minor incoordination during ambulation upon discharge. Conclusion These cases challenge the grave prognosis associated with this EEG pattern, particularly in post-anoxic comatose patients. Factors such as younger age, presence of shockable rhythms, and cause of arrest may have contributed to these favorable outcomes.