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The Epileptiform Significance of Intermittent Rhythmic Delta Activity in Childhood

Section of Child Neurology, St Christopher's Hospital for Children, and the Departments of Pediatrics and Neurology, Temple University School of Medicine, Philadelphia, PA

Catherine M. Foley, MD

Section of Child Neurology, St Christopher's Hospital for Children, and the Departments of Pediatrics and Neurology, Temple University School of Medicine, Philadelphia, PA

Intermittent rhythmic delta activity is reported in various disorders and is classified as a nonspecific abnormal electroencephalographic pattern. We have investigated its clinical and electroencephalographic features in childhood. Intermittent rhythmic delta activity was identified in 54 children over a period of 48 months. Epilepsy was present in 81%, 4% had only a single generalized tonic-clonic seizure, and 15% had no seizures. Generalized seizures were more common than partial seizures (83% versus 13%; 4% were mixed). The largest group of patients had idiopathic epilepsy. Epileptiform features were present in 70%. No patient identified prospectively has had a space-occupying lesion. Intermittent rhythmic delta activity should be considered an epileptiform pattern in children, most commonly occurring as an interictal pattern in primary generalized epilepsy. (J Child Neurol 1992; 7:156-160).

Journal of Child Neurology, Vol. 7, No. 2, 156-160 (1992)
DOI: 10.1177/088307389200700204


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