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ISSN 2007-6053 (Print)
Órgano oficial de difusión de los Hospitales Regionales de Alta Especialidad (HRAE)

2009, Number 1

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Evid Med Invest Salud 2009; 2 (1)

Comparative study of the video electroencephalographic findings in partial epilepsy of the temporal lobe with or without mesial temporal sclerosis

Isidro VSM, Fernández González-Aragón MC, Martínez JEI

Language: Spanish
References: 19
Page: 9-21
PDF size: 483.65 Kb.


ABSTRACT

Introduction: Temporal lobe epilepsy (TLE) is the most common type of focal epilepsy syndrome in adults and mesial temporal sclerosis (MTE) is the most frequent pathological substrate in patients operated on for TLE. In the majority of patients, the superficial video electroencephalogram (Video-EEG) records that show interictal and ictal patterns can provide sufficient information to identify the epileptogenic temporal lobe. There have been few studies that evaluate the correlation between the ictal and interictal Video-EEG findings and the presence or absence of MTE diagnosed by MRI.
Material and methods: A descriptive, comparative, transversal, observational study of patients diagnosed with TLE who had Video-EEG during the period January to November, 2007 was carried out. Patients who had not had a MRI classifying the presence or absence of MTE were excluded.
Results: 79 patients were included in the study. MTE was documented in 60.76%, a normal MRI in 22.78% and other damage in 16.46%. 85.42% of the MTE were unilateral and 14.58% were bilateral. Specific interictal graphoelements were found in 97.47% and non specific ones in 64.66%. In 25.32%, an ictal clinical event was recorded. Ictal activity was more frequently represented starting with spiked wave trains and rhythmic slow lateralized waves in patients with MTE compared to those who exhibited MTE with normal MRI. There was a low level of agreement (60%) in the laterality between the starting of ictal activity in the superficial EEG and the side of the MTE by MRI.
Conclusions: No significant differences were found in the type of EEG interictal findings between the study groups, and the agreement between the location of the MTE by MRI and the starting of the ictal focus in the superficial EEG was lower than expected. However the ictal EEG presentation was better defined in cases with MTE.


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