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Academia Mexicana de Neurología, A.C.

2008, Number 6

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Rev Mex Neuroci 2008; 9 (6)

Correlation between Video-Electroencephalography and Magnetic Resonance Image findings in patients with refractory focal epilepsy

Alarcón-Avilés T, Plascencia-Álvarez NI, Núñez-Orozco L

Language: Spanish
References: 25
Page: 432-437
PDF size: 133.58 Kb.


ABSTRACT

Introduction: Video-electroencephalogram (VEEG) and Magnetic resonance image (MRI) are very important in the evaluation of patients with refractory epilepsy. Objectives: To establish the relation between the interictal and ictal VEEG findings and the focal structural lesions in the MRI of patients with refractory epilepsy. Material and methods: We analyze 38 patients (n = 38) with focal epilepsy between 15 and 57 years with prolonged VEEG and MRI, applying central tendency and comparative concordance formula. Results: 19/38 (50%) had a temporal focus, 16/38 (42.1%) a frontal focus. The most common finding in the MRI was mesial temporal sclerosis (34.21%), encephalomalacia (21.05%), tumors (10.52%). We found a VEEG sensitivity of 0.94 and specificity of 0.84 for temporal lobe focus (Positive Predictive Value, PPV, of 0.91, Negative Predictive Value, NPV, of 0.89), sensitivity for frontal lobe was 0.79 and specificity 0.84 (PPV 0.80, NPV 0.78). The Kappa value was 0.78 for temporal lobe focus and 0.78 for frontal lobe focus. Conclusion: When we find focal alterations in the VEEG is necessary to search structural lesions with MRI because the possibility of finding a lesion is very high (84.21% in our sample).


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