AGE-RELATED CHANGES IN LATE VENTRICULAR POTENTIALS IN CHILDREN WITH IDIOPATHIC RIGHT BUNDLE BRANCH BLOCK

Abstract

The article provides information on the research conducted to study the parameters of late ventricular potentials in children with idiopathic right bundle branch block (RBBB). 127 children were involved in the study, taking into account the periods of childhood and age characteristics. These children are divided into 3 groups, 3-6 years old, Of these, 14 children (7 boys, 7 girls) aged 3-6 with RBBB were included in the main group of the 1st group, and 11 practically healthy children aged 3-6 were included in the control group. 34 children aged 7-11 years with RBBB (19 boys, 15 girls) were included in the main group of the 2nd group, and 11 practically healthy children aged 7-11 years were included in the control group. 43 children aged 12-17 years with RBBB (27 boys, 16 girls) were included in the main group of the 3rd group, and 14 practically healthy children aged 12-17 years were included in the control group. The following parameters of ventricular late potentials were studied in all children: TotORS (ms) - the duration of the filtered QRS complex, LAS40 (ms) - the duration of the filtered electrical waves with a frequency lower than 40 mV at the end of the QRS complex, RMS40 (mV) - filtered QRS index characterizing the mean square amplitude of the complex in the last 40 ms and the TotQRS/RMS40 ratio. In all 3 groups of children with RBBB, certain deviations in indicators of ventricular late potentials were found: in children with RBBB, VLP foci are detected due to electrophysiological inhomogeneity in the myocardium. These cases predispose to a higher risk of dangerous arrhythmias due to the addition of other metabolic disorders and pathologies in the future.