Low iron storage in children and adolescents with neurally mediated syncope.

OBJECTIVE: To investigate whether neurally mediated syncope (NMS) is associated with low iron storage or serum ferritin (SF). STUDY DESIGN: 206 children evaluated between 2000 and 2004 for probable syncope at a tertiary care Pediatric Neurology Clinic were included in a retrospective study. Serum ferritin (SF), iron, total iron binding capacity, and hemoglobin were measured prospectively after initial history taking and physical examination, along with other diagnostic testing. We defined iron deficiency (ID) as SF <12 microg/L, and low iron storage as SF