Etiology of faint in children with recurrent syncope and syncope‘ hemodynamic patterns

Object of dissertation: new practice of orthostatic test for prognostication mechanism of syncope in children. There is no published studies in Lithuania where researched causes and mechanisms of children syncope. Trying to find published studies about pediatric syncope or orthostatic test’s mechanism prediction was failed despite of presence such trials in adults. Research was performed in two steps. The first step: detail anamnesis, objective physical examination, basic laboratory examination 12-lead electrocardiogram and echocardioscopy in 214 children with at least three syncope episodes in anamnesis. Data were compared with such data of children with no syncope episode in anamnesis. The second step: Orthostatic testing was performed in all children having no contraindication for such testing. Detail analysis of hemodynamic changes in orthostatic test results due to hemodynamic pattern carried in children with syncope. In conclusions of dissertation is declarated that active orthostatic test is effective for syncope simulation and hemodynamic pattern’s investigation in children with recurrent syncope. Hemodynamic pattern of syncope can’t be predicted due to patients age, sex, physical development or frequency of syncope in anamnesis. Circumstances before syncope can predict reflex and cardiac syncope. Hemodynamic pattern can be predicted according to blood pressure and heart rate changes before child looses his conscious