Hyperglycemia with Occipital Seizures: Images and Visual Evoked Potentials
Open Access
- 30 June 2005
- Vol. 46 (7), 1140-1144
- https://doi.org/10.1111/j.1528-1167.2005.56404.x
Abstract
Hyperglycemia may rarely be seen with visual seizures. Observation of both visual evoked potentials (VEPs) and magnetic resonance imaging (MRI) in visual status epilepticus (SE) has not been reported. We describe acute and follow-up VEP and MRI findings of a patient with hyperglycemia-related visual SE of occipital origin.In a 59-year-old diabetic woman, complex visual hallucinations and illusions developed with < or =10 seizures per hour as an initial manifestation of nonketotic hyperglycemia.Neurologic examination revealed ictal nystagmus to the right and continuous right hemianopsia. Ictal electroencephalography (EEG) and Tc-99m hexamethylpropylene amine oxime (HMPAO) single-photon emission computed tomography (SPECT) revealed an epileptogenic focus in the left occipital lobe. MRI with fluid-attenuated inversion recovery showed focal subcortical hypointensity and gyral hyperintensity. Follow-up MRI showed only minimal gyral hyperintensity at 6 months. The P100 amplitude of VEP was significantly higher at the right occipital area during SE, but slightly higher on the left after the patient had been seizure free for 6 months.Occipital seizures and hemianopsia can be caused by hyperglycemia and may be accompanied by special MRI and VEP findings.This publication has 10 references indexed in Scilit:
- Subcortical Hypointensity in Partial Status Epilepticus Associated with Nonketotic HyperglycemiaJournal of Neuroimaging, 2003
- Focal Status Epilepticus: Clinical Features and Significance of Different EEG PatternsEpilepsia, 1999
- Ictal single photon emission computed tomography in occipital lobe seizures.Epilepsia, 1997
- Gaze‐Evoked Visual Seizures in Nonketotic HyperglycemiaEpilepsia, 1991
- Hyperglycemia Presenting with Occipital SeizuresEpilepsia, 1991
- The relationship between visual seizures and visual evoked potentialsInternational Journal of Neuroscience, 1985
- Hemispheric asymmetry of visual evoked potentials in patients with well-defined occipital lesionsElectroencephalography and Clinical Neurophysiology, 1984
- Hypercapnic Alteration of Visual Evoked Responses in Acute Cerebral InfarctionArchives of Neurology, 1979
- The asymmetrical visual evoked potential to pattern reversal in one half field and its significance for the analysis of visual field defects.British Journal of Ophthalmology, 1977
- Neurological Dysfunction Associated With Nonketotic HyperglycemiaArchives of Neurology, 1968