• Epilepsy & behavior : E&B · Feb 2007

    Seizures during intracarotid methohexital and amobarbital testing.

    • Tobias Loddenkemper, Gabriel Möddel, Stephan U Schuele, Elaine Wyllie, and Harold H Morris.
    • Department of Neurology, Cleveland Clinic, Cleveland, OH, USA. loddent@ccf.org
    • Epilepsy Behav. 2007 Feb 1; 10 (1): 49-54.

    BackgroundMethohexital and amobarbital have been used as agents for Wada testing in the presurgical evaluation of patients with epilepsy. Previous experience with methohexital as an anesthetic indicates that methohexital may decrease seizure threshold and may trigger seizures.MethodsA retrospective chart review of 760 intracarotid amobarbital and methohexital tests was performed to determine the frequency of seizures associated with preoperative intracarotid barbiturate testing for language and memory lateralization.ResultsSixteen patients (2.1%) who had seizures were found. In 3 patients, seizures occurred prior to barbiturate injection, and in 13, following barbiturate injection. After injection of amobarbital, 4 of 538 patients (0.7%) had a seizure. Nine of 222 patients had a seizure after methohexital injection (4.1%) (P=0.001).ConclusionPatients with a previous history of epilepsy may be at higher risk for seizures after methohexital injection as compared with amobarbital injection.

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