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KMID : 0391520130210040250
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Journal of the Korean Child Neurology Society
2013 Volume.21 No. 4 p.250 ~ p.259
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Syncope vs Epilepsy; Neurodiagnostic Evaluations for Differential Diagnosis
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Kim Min-Jee
Kim Eun-Hee
Choi Hae-Won
Yum Mi-Sun
Ko Tae-Sung
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Abstract
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Purpose : The differential diagnosis between seizure and syncope in a child who visits pediatric neurology clinic with the history of loss of consciousness (LOC), is always challenging issues to the pediatricians. We tried to identify the clinical and laboratory differences between epilepsy and syncope and evaluate the usefulness of EEG and head-up tilt test.
Methods : We retrospectively reviewed the medical records of children who visited pediatric neurology clinic in Asan Medical Center with history of LOC from 2007 to 2011. Patients were divided into three groups, as syncope, epilepsy and
syncope with epilepsy, by the diagnosis at the last follow-up. The initial clinical presentations and laboratory findings of each group were evaluated.
Results : A total of 145 children were reviewed, but 84 children out of them were included (45 boys, mean age; 13.2 years). Seventy of 84 children (83%) were diagnosed as syncope, 8 (10%) syncope with epilepsy, 6 (7%) epilepsy. Among the
syncope groups, neurocardiogenic syncope was the most common, 67(95.7%). The ictal phenomenon such as aura, eyeball deviation, cyanosis and urination were significantly higher in epilepsy patients (P ?0.001). The abnormal EEG findings were more likely to be in the epilepsy group, but the sensitivity and specificity was 57%, 90%, respectively. The sensitivity and specificity of head-up tilt tests for syncope were 79% and 100%. Recurrence during follow-up periods were more frequent in epilepsy group (1.2±3.8 vs10±10.3, P ?0.001).
Conclusion : Appropriate assessment from history and laboratory data may lead to the proper diagnosis and management in children with LOC, and the careful followup and reevaluations are essential to prevent recurrence of LOC.
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KEYWORD
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EEG, Head-up tilt test, Loss of consciousness, Seizure, Syncope
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