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Ambulatory Electroencephalography (EEG) in Children: Diagnostic Yield and Tolerability

Child and Adolescent Neurology, Mayo Clinic, Rochester, Minnesota, wirrell.elaine{at}mayo.edu

Silvia Kozlik, RET

Alberta Children's Hospital, Calgary, Alberta, Canada

Jose Tellez, MD, PhD

Royal University Hospital, Department of Medicine, Division of Neurology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada

Samuel Wiebe, MD

Foothills Medical Center, Calgary, Alberta, Canada, Department of Clinical Neurosciences, University of Calgary

Lorie Hamiwka, MD

Child and Adolescent Neurology, Mayo Clinic, Rochester, Minnesota, Department of Clinical Neurosciences, University of Calgary, Department of Pediatrics University of Calgary, Calgary, Alberta, Canada

Sixty-four children, aged 0-17 years, undergoing ambulatory electroencephalography (EEG) were prospectively recruited during a 12-month period. The diagnostic yield of ambulatory electroencephalography was determined for each of the following groups: group 1: differentiation of seizures from nonepileptic events; group 2: determination of seizure/interictal discharge frequency; and group 3: classification of seizure type or localization. The ambulatory electroencephalography answered the clinical question in 61% of group 1 (27/44) and 100% of groups 2 (16/16) and 3 (4/4). Of 44 cases in Group 1, clinical events were recorded in 61%; the ambulatory electroencephalography result changed the diagnosis from epileptic to nonepileptic or vice versa in 27%. When clinicians suspected that events were epileptic, ambulatory electroencephalography changed the clinical impression in 50%, whereas when events were suspected to be nonepileptic, ambulatory electroencephalography confirmed that impression in 83%.

Key Words: ambulatory EEG • epilepsy

Journal of Child Neurology, Vol. 23, No. 6, 655-662 (2008)
DOI: 10.1177/0883073808314158


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