<abstract xmlns="http://www.w3.org/1999/xhtml"><sec id="j_joepi-2016-0001_s_001"><h3>Backgrand</h3><p>Lateralized periodic discharges (LPDs) are infrequent electroencephalograph (EEG) findings, and may present in ictal or interictal form. They are regarded as potential electrophysiologic signs of convulsive or nonconvulsive status epilepticus (NCSE). We report four patients who presented with NCSE and one who presented with convulsive status epilepticus in the postictal period, characterized by LPDs in EEG recordings in the first year after stroke.</p></sec><sec id="j_joepi-2016-0001_s_002"><h3>Material and methods</h3><p>We prospectively evaluated patients who clinically presented with status epilepticus associated LPDs between March 2014 and March 2015. We investigated patients that presented with a new stroke occurrence. We excluded the other LPD etiologies.</p><p>EEG studies of five patients (two men) who were admitted to our emergency unit with confusion, three of whom had visual symptoms; four were treated for NCSE as diagnosed with LPDs. The fifth patient had convulsive status epilepticus with LPD in the postictal period.</p></sec><sec id="j_joepi-2016-0001_s_003"><h3>Results and Discussion</h3><p>None of the five patients, who were aged between 68 and 92 years, showed any etiologic factor other than a history of cerebrovascular disease (CVD). Magnetic resonance imaging studies of the patients revealed old infarcts and transitional diffusion restrictions. The clinical and EEG findings decreased substantially upon antiepileptic drug treatment. Herein, we illustrate the first patient who had confusion, visual hallucinations, and ictal and interictal LPD in her consecutive EEGs.</p></sec><sec id="j_joepi-2016-0001_s_004"><h3>Conclusions</h3><p>CVDs may pave the way for LPDs in patients with a history of stroke because CVDs cause structural brain damage. Patients who present with a similar clinical profile and imaging signs of stroke should be checked for NCSE, particularly in the presence of LPDs in EEGs.</p></sec></abstract>

BackgrandLateralized periodic discharges (LPDs) are infrequent electroencephalograph (EEG) findings, and may present in ictal or interictal form. They are regarded as potential electrophysiologic signs of convulsive or nonconvulsive status epilepticus (NCSE). We report four patients who presented with NCSE and one who presented with convulsive status epilepticus in the postictal period, characterized by LPDs in EEG recordings in the first year after stroke.Material and methodsWe prospectively evaluated patients who clinically presented with status epilepticus associated LPDs between March 2014 and March 2015. We investigated patients that presented with a new stroke occurrence. We excluded the other LPD etiologies.EEG studies of five patients (two men) who were admitted to our emergency unit with confusion, three of whom had visual symptoms; four were treated for NCSE as diagnosed with LPDs. The fifth patient had convulsive status epilepticus with LPD in the postictal period.Results and DiscussionNone of the five patients, who were aged between 68 and 92 years, showed any etiologic factor other than a history of cerebrovascular disease (CVD). Magnetic resonance imaging studies of the patients revealed old infarcts and transitional diffusion restrictions. The clinical and EEG findings decreased substantially upon antiepileptic drug treatment. Herein, we illustrate the first patient who had confusion, visual hallucinations, and ictal and interictal LPD in her consecutive EEGs.ConclusionsCVDs may pave the way for LPDs in patients with a history of stroke because CVDs cause structural brain damage. Patients who present with a similar clinical profile and imaging signs of stroke should be checked for NCSE, particularly in the presence of LPDs in EEGs.

Lateralized periodic discharges associated with status epilepticus in the first year after stroke

Journal of Epileptology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

BackgrandLateralized periodic discharges (LPDs) are infrequent electroencephalograph (EEG) findings, and may present in ictal or interictal form. They are...

Lateralized periodic discharges associated with status epilepticus in the first year after stroke

Published Online: Mar 17, 2016

Page range: 15 - 23

Received: Dec 15, 2015

Accepted: Mar 10, 2016

DOI: https://doi.org/10.21307/joepi-2016-0002

Keywords
nonconvulsive status epilepticus, lateralized periodic discharges, focal seizures, MRI, negative symptoms

© 2016 Hava Ozlem Dede et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Lateralized periodic discharges associated with status epilepticus in the first year after stroke

Published Online: Mar 17, 2016

Page range: 15 - 23

Received: Dec 15, 2015

Accepted: Mar 10, 2016

DOI: https://doi.org/10.21307/joepi-2016-0002

Keywordsnonconvulsive status epilepticus, lateralized periodic discharges, focal seizures, MRI, negative symptoms

© 2016 Hava Ozlem Dede et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
nonconvulsive status epilepticus, lateralized periodic discharges, focal seizures, MRI, negative symptoms