Redefining periodic patterns on electroencephalograms of patients with sporadic Creutzfeldt-Jakob disease.
We aimed to redefine various periodic patterns (PPs) observed on electroencephalography (EEG) in patients with sporadic Creutzfeldt-Jakob disease (sCJD) using the American Clinical Neurophysiology Society's (ACNS) Criteria.



We analyzed EEG data of 23 patients with sCJD were admitted to two university hospitals between August 2005 and September 2015.



We classified PPs on EEG data into three types: irregular periodic discharges (PDs) with superimposed rhythmic activities, appearing at a median of 8weeks after onset (w.a.o.); rhythmic sharp-and-wave, at a median of 11w.a.o.; and PDs with biphasic or triphasic morphology, at a median of 17w.a.o. Of 16 patients presenting with PPs, 14 had widespread lesions in both cortical and subcortical areas with clinical stage III at admission, and shorter time intervals for admission to hospital from disease onset than patients without PPs (Patients with PP, 11.6±12.2weeks; without PP, 18.2±8.3weeks; p=0.033).



PPs largely presented as three types at different stages of disease progression, and patients who had PPs had more wide spread lesions and rapid disease progression.



Our redefinition of PPs demonstrated on EEG using the ACNS criteria may contribute to further understanding of the pathological mechanisms of sCJD, and PPs might be a predictive factor of a rapid sCJD progression.
Department of Neurology, CHA Bundang Medical Center, CHA University, Seongnam, South Korea.
Jung-Won
JW
Shin
Department of Neurology, CHA Bundang Medical Center, CHA University, Seongnam, South Korea.
Byeongsoo
B
Yim
Department of Neurology, CHA Bundang Medical Center, CHA University, Seongnam, South Korea.
Seung Hun
SH
Oh
Department of Biomedical Science, College of Life Science, CHA University, Seongnam, South Korea.
Nam Keun
NK
Kim
Department of Neurology, Seoul National University Hospital, Seoul, South Korea.
Sang Kun
SK
Lee
Department of Neurology, CHA Bundang Medical Center, CHA University, Seongnam, South Korea. Electronic address: okjun77@cha.ac.kr.
Ok-Joon
OJ
Kim
D000368:Aged; D000369:Aged, 80 and over; D007562:Creutzfeldt-Jakob Syndrome / Q000175:diagnosis* / Q000503:physiopathology; D004569:Electroencephalography / Q000379:methods / Q000592:standards*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017410:Practice Guidelines as Topic / Q000592:standards
American Clinical Neurophysiology Society’s Criteria; Periodic patterns; Sporadic Creutzfeldt–Jakob disease