Purpose: Markers for epileptic seizures are rare and their use has not been established in the evaluation of seizures and febrile convulsions (FC). Brain-type natriuretic peptide (BNP) is a natriuretic, diuretic, and vasodilator compound first discovered in the hypothalamus but mainly synthesized in the myocardium. The aim of this study was to assess whether epileptic seizures or FC are related to increased secretion of the N-terminal fragment of BNP (NT-proBNP).
Methods: Sixty-five postictal children (43 boys, 22 girls) and 31 children with epilepsy (20 boys, 11 girls) after a seizure-free period for at least 2 months serving as controls were enrolled. Postictal NT-proBNP levels were analyzed and controlled 24-48 h thereafter.
Results: Plasma concentration of NT-proBNP was significantly higher 4 h postictal compared to 24-48 h postictal (p < 0.001). Subgroup analysis revealed increased NT-proBNP levels in children with tonic-clonic seizures and FC compared to children with partial motor seizures (p < 0.001), syncope (SYN; p < 0.01), or control population (p < 0.001).
Conclusions: Our results suggest that elevated plasma NT-proBNP levels are not specific for cardiac dysfunction. Postictal measurement of plasma NT-proBNP seems to be useful in discriminating different types of epilepsy, FC, and SYN in childhood.
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