The effect of metrizamide on the electroencephalogram: a prospective study in 61 patients.

Abstract:

:A prospective study was made of changes in the electroencephalogram after the use of metrizamide for myelography and posterior fossa cisternography in 61 patients (62 studies). The EEG changed in 21 patients (34%); 3 of these had had previously abnormal records, and the abnormalities were accentuated on the second recording. Eight developed paroxysmal activity, including spike and wave in 1. EEG changes appeared 24 to 48 hours after the use of metrizamide in 6 patients whose intervening EEGs were normal. The percentage of records that changed tended to increase as metrizamide was brought to more rostral levels. Symptoms following the use of metrizamide were reviewed in 58 patients. Although there were no seizures in the present series, seizures did occur with subsequent use of metrizamide in 3 other patients at our institution. Previous reports may have underestimated the frequency of EEG changes after metrizamide since these may require 24 to 48 hours to develop. The appearance of such activity suggests that the use of metrizamide in patients with known seizure disorders, the anatomical level to which metrizamide is brought during radiography, removal of contrast medium, and further investigation of premedication with anticonvulsants all require careful consideration when use of metrizamide is being contemplated.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Ropper AH,Chiappa KH,Young RR

doi

10.1002/ana.410060308

subject

Has Abstract

pub_date

1979-09-01 00:00:00

pages

222-6

issue

3

eissn

0364-5134

issn

1531-8249

journal_volume

6

pub_type

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