Search for: [Abstract = "ibitory reaction \- CI\), \- depressed heart rhythm and hypotension \(the mixed reaction \- MX\). Valuable indirect indices of the autonomous system activity, the dysfunction of which leads to neurocardiogenic syncope, include heart rate variability \(HRV\) detected in 24\-hour EKG Holter monitoring. As it follows from the observations of numerous investigators, in individuals with NS, tilting reveals disturbances in sympathetic\-parasympathetic balance, manifested by HRV changes, in particular in the value of specific parameters of temporal and frequential HRV analysis. Such balance disturbances are also observed in some patients with mitral valve prolapse \(MVP\). Assuming that the background of NS and disturbances observed in MVP lies in dysfunction and dyscoordination of the vegetative system components, the analysis of heart rate variability may be of assistance in determination of the incidence of NS and selection of appropriate therapeutic management. The objective of the investigation was\: 1. to select from children and adolescents seen due to syncope episodes a group of patients with NS \(along with assessment of their age and gender\) and to determine the prevalence of NS among other causes of follow\-up examinations in patients of Cardiology Outpatient Department, 2. to establish the type of cardiovascular reaction and the time of its occurrence in reaction to TT in childre"]

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