Abstract
The purpose of our study was to search for possible changes in the parameters of the cardiovascular system in adolescents during the period from 2004 to 2020 against the background of the introduction of digital technologies into the educational environment. Methods: A comparative analysis of the parameters of the cardiovascular system in female and male adolescents aged from 13.9 to 15.4 years was carried out (57 adolescents in 2004 and 53 adolescents in 2020). We used a spiroartheriocardiorythmograph allowing recording of heart rate (HR) and blood pressure (BP) and spectral parameters of HR variability and variability of systolic (sBP) and diastolic (dBP) BP. The parameters were recorded at rest in the sitting position for over two min. All studies were performed during school hours in February-March. Results: An increase in the mean sBP values and an increase in the proportion of adolescents with BP in the
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