Developmental medicine and child neurology · 2024
Differentiating non-epileptic seizures from epileptic seizures in Glut1 deficiency syndrome.
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Ito Yasushi, Nakatsukasa Hidetsugu, Toyoma Yuriko, Nagata Satoru, Oguni Hirokazu
Аннотация
AIM: To investigate the clinical characteristics of non-epileptic seizures due to transient brain dysfunction caused by energy deficiency after prolonged fasting or exercise in individuals with glucose transporter type 1 deficiency syndrome (Glut1DS), and then elucidate further the seizure features to distinguish non-epileptic seizures from epileptic seizures.
METHOD: This retrospective case-control study included 57 non-epileptic seizures and 23 epileptic seizures (control group) in 14 individuals (11 males, three females; aged 5-44 years, median = 20 years) with Glut1DS, all with a heterozygous pathogenic SLC2A1 mutation.
RESULTS: Non-epileptic seizures were classified as paroxysmal altered consciousness (n = 8), movement disorders (n = 35) (eye-head movements, ataxia, spasticity, weakness, involuntary movement), dysaesthesia (n = 8), and vomiting (n = 6) at the peak ages at onset of 5 to 10 years. Ketogenic diet therapy was effective in 33 of 43 (77%) non-epileptic seizures. Providing supplementary food before high-impact exercise or during attacks prevented or mitigated non-epileptic seizures in some individuals. Glut1DS-associated non-epileptic seizures are fundamentally situation-related seizures with specific provoking and ameliorating factors. Non-epileptic seizures can be distinguished from epileptic seizures by the absence of complete consciousness loss and rapid postictal recovery despite prolonged seizures.
INTERPRETATION: Non-epileptic seizures are not well recognized but require different therapeutic approaches compared to epileptic seizures. Awareness of the differentiation of non-epileptic seizures from epileptic seizures is essential when performing preventive or therapeutic decision-making for acute exacerbation seizures.
WHAT THIS PAPER ADDS: Non-epileptic seizures are invariably situation-related seizures. Non-epileptic seizures were classified as altered consciousness, movement disorders, dysaesthesia, and vomiting. Non-epileptic seizures were characterized by the absence of complete consciousness loss and were accompanied by rapid recovery. Non-epileptic seizures can occur simultaneously or consecutively with another. Supplementary food can be effective in preventing the development of sustained exercise-induced movement disorders.
METHOD: This retrospective case-control study included 57 non-epileptic seizures and 23 epileptic seizures (control group) in 14 individuals (11 males, three females; aged 5-44 years, median = 20 years) with Glut1DS, all with a heterozygous pathogenic SLC2A1 mutation.
RESULTS: Non-epileptic seizures were classified as paroxysmal altered consciousness (n = 8), movement disorders (n = 35) (eye-head movements, ataxia, spasticity, weakness, involuntary movement), dysaesthesia (n = 8), and vomiting (n = 6) at the peak ages at onset of 5 to 10 years. Ketogenic diet therapy was effective in 33 of 43 (77%) non-epileptic seizures. Providing supplementary food before high-impact exercise or during attacks prevented or mitigated non-epileptic seizures in some individuals. Glut1DS-associated non-epileptic seizures are fundamentally situation-related seizures with specific provoking and ameliorating factors. Non-epileptic seizures can be distinguished from epileptic seizures by the absence of complete consciousness loss and rapid postictal recovery despite prolonged seizures.
INTERPRETATION: Non-epileptic seizures are not well recognized but require different therapeutic approaches compared to epileptic seizures. Awareness of the differentiation of non-epileptic seizures from epileptic seizures is essential when performing preventive or therapeutic decision-making for acute exacerbation seizures.
WHAT THIS PAPER ADDS: Non-epileptic seizures are invariably situation-related seizures. Non-epileptic seizures were classified as altered consciousness, movement disorders, dysaesthesia, and vomiting. Non-epileptic seizures were characterized by the absence of complete consciousness loss and were accompanied by rapid recovery. Non-epileptic seizures can occur simultaneously or consecutively with another. Supplementary food can be effective in preventing the development of sustained exercise-induced movement disorders.