4.4 Article

Clinical Characteristics and Treatment Outcomes of De Novo Nonconvulsive Status Epilepticus: A Retrospective Study

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JOURNAL OF CLINICAL NEUROLOGY
卷 17, 期 1, 页码 26-32

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KOREAN NEUROLOGICAL ASSOC
DOI: 10.3988/jcn.2021.17.1.26

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nonconvulsive status epilepticus; de novo; modified Rankin Scale; metabolic

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This study retrospectively reviewed the clinical features and EEG findings of patients with nonconvulsive status epilepticus (NCSE) and found that acute metabolic disturbances were significantly correlated with poor outcomes. Adequate treatment of underlying reversible disorders and controlling seizures is critical for patients with NCSE.
Background and Purpose Nonconvulsive status epilepticus (NCSE) is challenging to diagnose. This study aimed to describe and classify the clinical features and electroencephalography (EEG) findings of patients with de novo NCSE and to correlate them with clinical outcomes. Methods We retrospectively reviewed the medical and EEG records of patients admitted to our institution with altered mentation and EEG abnormalities from January 1, 2013 to December 31, 2018. We evaluated premorbid modified Rankin Scale (mRS) scores, underlying disorders, precipitating factors, clinical manifestations, laboratory tests, and outcomes after a 3-month follow-up. Patients who met the Salzburg Consensus Criteria for NCSE were categorized into good-outcome and poor-outcome groups. A good outcome was defined as 1) clinical and electrographic seizures ceasing after treatment, and 2) an mRS score of <= 2 or remaining unchanged during the 3-month follow-up. A poor outcome was defined as 1) death, 2) seizures continuing despite treatment, or 3) a follow-up mRS score of >= 3 in a patient with a premorbid mRS score of <= 2, or a follow-up mRS score that increased in a patient with a premorbid mRS score of >= 3. Results The 48 included patients comprised 37 categorized into the good-outcome group and 11 into the poor-outcome group. The presence of acute metabolic disturbances was significantly correlated with poor outcome (p=0.036), while the other analyzed variables were not significantly correlated with outcomes. Conclusions Acute metabolic disturbances in NCSE are associated with poor outcomes. Adequate treatment of underlying reversible disorders alongside controlling seizures is critical for patients with NCSE.

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