EEG Abnormalities and Their Radiographic Correlates in a COVID-19 Inpatient Cohort. Issue 1 (February 2022)

• Record Type: Journal Article
• Authors: Hwang, Sean T.; Ballout, Ahmad A.; Sonti, Anup N.; Kapyur, Amitha; Kirsch, Claudia; Singh, Neeraj; Markowitz, Noah; Leung, Tung Ming; Chong, Derek J.; Temes, Richard; Pacia, Steven V.; Kuzniecky, Ruben I.; Najjar, Souhel
• Is Part Of: Neurology. Volume 12:Issue 1(2022)
• Publication Date: 2022-02
• Subjects: Nervous system -- Diseases -- Periodicals; Neurology -- Periodicals; Neurology -- United States -- Periodicals; 616.8
• DOI: 10.1212/CPJ.0000000000001136
• Languages: English
• ISSNs: 2163-0402

Abstract

Abstract : Background and Objectives: To identify the prevalence of EEG abnormalities in patients with coronavirus disease 2019 (COVID-19) with neurologic changes, their associated neuroimaging abnormalities, and rates of mortality. Methods: A retrospective case series of 192 adult COVID-19-positive inpatients with EEG performed between March and June 2020 at 4 hospitals: 161 undergoing continuous, 24 routine, and 7 reduced montage EEG. Study indication, epilepsy history, intubation status, administration of sedatives or antiseizure medications (ASMs), metabolic abnormalities, neuroimaging pathology associated with epileptiform abnormalities, and in-hospital mortality were analyzed. Results: EEG indications included encephalopathy (54.7%), seizure (18.2%), coma (17.2%), focal deficit (5.2%), and abnormal movements (4.6%). Epileptiform abnormalities occurred in 39.6% of patients: focal intermittent epileptiform discharges in 25.0%, lateralized periodic discharges in 6.3%, and generalized periodic discharges in 19.3%. Seizures were recorded in 8 patients, 3 with status epilepticus. ASM administration, epilepsy history, and older age were associated with epileptiform abnormalities. Only 26.3% of patients presented with any epileptiform abnormality, 37.5% with electrographic seizures, and 25.7% patients with clinical seizures had known epilepsy. Background findings included generalized slowing (88.5%), focal slowing (15.6%), burst suppression (3.6%), attenuation (3.1%), and normal EEG (3.1%). Neuroimaging pathology was identified in 67.1% of patients with epileptiform abnormalities, over two-thirds acute. In-hospital mortality was 39.5% for patients with epileptiform abnormalities and 36.2% for those without. Risk factors for mortality were coma and ventilator support at time of EEG. Discussion: This article highlights the range of EEG abnormalities frequently associated with acute neuroimaging abnormalities in COVID-19. Mortality rates were high, particularly for patients in coma requiring mechanical ventilation. These findings may guide the prognosis and management of patients with COVID-19 and neurologic changes.