2020
Neuroimaging Correlates of Lateralized Rhythmic Delta Activity, Lateralized Periodic Discharges, and Generalized Rhythmic Delta Activity on EEG in Critically Ill Patients
Alzawahmah M, Fong MWK, Gilmore EJ, Hirsch LJ. Neuroimaging Correlates of Lateralized Rhythmic Delta Activity, Lateralized Periodic Discharges, and Generalized Rhythmic Delta Activity on EEG in Critically Ill Patients. Journal Of Clinical Neurophysiology 2020, 39: 228-234. PMID: 33235178, DOI: 10.1097/wnp.0000000000000763.Peer-Reviewed Original ResearchConceptsRhythmic delta activityDelta activityMRI abnormalitiesNormal MRIGeneralized rhythmic delta activityLateralized rhythmic delta activityLateralized periodic dischargesCritically Ill PatientsMajority of patientsMultifocal abnormalitiesIll patientsFocal findingsMRI characteristicsFocal abnormalitiesLRDAPatientsDiscordant findingsEpileptiform patternsMost abnormalitiesContinuous EEGPeriodic dischargesAbnormalitiesEEG patternsStatistical significanceMRINonepileptic Electroencephalographic Correlates of Episodic Increases in Intracranial Pressure
Sheikh ZB, Maciel CB, Dhakar MB, Hirsch LJ, Gilmore EJ. Nonepileptic Electroencephalographic Correlates of Episodic Increases in Intracranial Pressure. Journal Of Clinical Neurophysiology 2020, 39: 149-158. PMID: 32701765, DOI: 10.1097/wnp.0000000000000750.Peer-Reviewed Original ResearchDeep Versus Lobar Intraparenchymal Hemorrhage: Seizures, Hyperexcitable Patterns, and Clinical Outcomes.
Sheikh ZB, Stretz C, Maciel CB, Dhakar MB, Orgass H, Petroff OA, Hirsch LJ, Gilmore EJ. Deep Versus Lobar Intraparenchymal Hemorrhage: Seizures, Hyperexcitable Patterns, and Clinical Outcomes. Critical Care Medicine 2020, 48: e505-e513. PMID: 32301843, DOI: 10.1097/ccm.0000000000004317.Peer-Reviewed Original ResearchConceptsDeep intraparenchymal hemorrhageElectrographic seizuresIntraparenchymal hemorrhageRhythmic delta activityTemporal lobe involvementPoor outcomeLobar groupThalamic involvementClinical outcomesLobe involvementDelta activityTertiary academic medical centerNontraumatic intraparenchymal hemorrhagesConsecutive adult patientsRetrospective cohort studyFisher's exact testMann-Whitney U testAcademic medical centerSpike-wave complexesIntraparenchymal hemorrhage volumeAdult patientsCohort studyMultivariable analysisHematoma volumeInsular involvement
2019
Continuous EEG Findings in Autoimmune Encephalitis.
Moise AM, Karakis I, Herlopian A, Dhakar M, Hirsch LJ, Cotsonis G, LaRoche S, Cabrera Kang CM, Westover B, Rodriguez A. Continuous EEG Findings in Autoimmune Encephalitis. Journal Of Clinical Neurophysiology 2019, 38: 124-129. PMID: 31800465, PMCID: PMC7263965, DOI: 10.1097/wnp.0000000000000654.Peer-Reviewed Original ResearchConceptsNew-onset refractory status epilepticusRefractory status epilepticusRhythmic delta activityGeneralized rhythmic delta activityAutoimmune encephalitisStatus epilepticusDelta activityPoor outcomeAE subtypeFast activityAntibody-negative autoimmune encephalitisN-methyl-D-aspartate receptorsDefinite limbic encephalitisExtreme delta brushMulticenter retrospective reviewNew-onset seizuresContinuous EEG monitoringGlutamic acid decarboxylaseVoltage-gated potassium channelsLimbic encephalitisRetrospective reviewAE patientsElectrographic seizuresDelta brushEEG findings
2018
Definition and Classification of Periodic and Rhythmic Patterns
Maciel CB, Hirsch LJ. Definition and Classification of Periodic and Rhythmic Patterns. Journal Of Clinical Neurophysiology 2018, 35: 179-188. PMID: 29718827, DOI: 10.1097/wnp.0000000000000462.Peer-Reviewed Original ResearchConceptsAmerican Clinical Neurophysiology SocietyContinuous video-EEG recordingOverall clinical implicationsAcute brain injuryRhythmic delta activityVideo-EEG recordingsEpileptogenic potentialTherapeutic algorithmAbnormal findingsNonconvulsive seizuresComatose patientsBrain injuryClinical indicationsInpatient settingDelta activityClinical implicationsMorphologic featuresPeriodic dischargesStandardized definitionsPatientsPrevalence of occurrenceDefinitive evidenceExcellent temporal resolutionIschemia detectionOfficial guidelines
2017
Association of an Electroencephalography-Based Risk Score With Seizure Probability in Hospitalized Patients
Struck AF, Ustun B, Ruiz AR, Lee JW, LaRoche SM, Hirsch LJ, Gilmore EJ, Vlachy J, Haider HA, Rudin C, Westover MB. Association of an Electroencephalography-Based Risk Score With Seizure Probability in Hospitalized Patients. JAMA Neurology 2017, 74: 1419-1424. PMID: 29052706, PMCID: PMC5822188, DOI: 10.1001/jamaneurol.2017.2459.Peer-Reviewed Original ResearchConceptsIll patientsSeizure riskContinuous EEGRisk factorsMAIN OUTCOMEScoring systemBilateral independent periodic dischargesEpilepsy Monitoring Unit (EMU) admissionPeriodic dischargesBrief rhythmic dischargesProspective multicenter databaseSeizure risk factorsSporadic epileptiform dischargesRisk of seizuresRhythmic delta activitySimple scoring systemEligible patientsProbability of seizuresUnit admissionAcute illnessHospitalized patientsMulticenter databasePrior seizuresClinical historyClinical indicationsAssociation of Periodic and Rhythmic Electroencephalographic Patterns With Seizures in Critically Ill Patients
Ruiz A, Vlachy J, Lee JW, Gilmore EJ, Ayer T, Haider HA, Gaspard N, Ehrenberg JA, Tolchin B, Fantaneanu TA, Fernandez A, Hirsch LJ, LaRoche S. Association of Periodic and Rhythmic Electroencephalographic Patterns With Seizures in Critically Ill Patients. JAMA Neurology 2017, 74: 181-188. PMID: 27992625, DOI: 10.1001/jamaneurol.2016.4990.Peer-Reviewed Original ResearchConceptsRhythmic delta activityDelta activityPeriodic dischargesIll patientsSeizure riskElectroencephalographic patternsStimulation-induced patternsCritically Ill PatientsRisk of seizuresHigher seizure riskAcademic medical centerFrequency-dependent mannerSeizure incidenceIll adultsRisk stratificationHigh prevalenceMedical CenterMAIN OUTCOMEContinuous electroencephalographySeizuresPattern prevalenceMultivariate analysisPatientsClinical decisionRhythmic patterns
2013
Similarity of Lateralized Rhythmic Delta Activity to Periodic Lateralized Epileptiform Discharges in Critically Ill Patients
Gaspard N, Manganas L, Rampal N, Petroff OA, Hirsch LJ. Similarity of Lateralized Rhythmic Delta Activity to Periodic Lateralized Epileptiform Discharges in Critically Ill Patients. JAMA Neurology 2013, 70: 1288-1295. PMID: 23921464, DOI: 10.1001/jamaneurol.2013.3475.Peer-Reviewed Original ResearchConceptsLateralized rhythmic delta activityRhythmic delta activityContinuous EEG monitoringIll patientsDelta activityPeriodic dischargesAcute seizuresClinical significanceIll subjectsEEG monitoringEEG patternsPeriodic lateralized epileptiform dischargesJuxtacortical white matterContinuous electroencephalography monitoringIntensive care unitCross-sectional prevalenceFocal EEG abnormalitiesAcademic medical centerSimilar clinical significanceRadiological correlatesEarly seizuresMost patientsAcute illnessDischarge groupIndependent predictors