[Incidence of sudden cardiac death among diseases of the circulatory system during the COVID-19 pandemic in the Penza region].

Objective: To study the incidence of sudden cardiac death (SCD) among overall and primary morbidity of diseases of the circulatory system (DCS) during the COVID-19 pandemic, as well as several years before it in urban and rural populations of the Penza region.

Material And Methods: Statistical analysis of data using correlation (Pearson's coefficient), regression methods, t-test was performed to determine the significance of results.

Results: The higher incidence of DCS among men in urban areas has been found.

[Trends in the incidence of mental and behavioral disorders during the COVID-19 pandemic in Penza Oblast].

Objective: An analysis of the trend of overall and primary incidence of mental and behavioral disorders, including those caused by the use of psychoactive substances, in different age groups during the COVID-19 pandemic in Penza Oblast.

Material And Methods: The data were obtained from statistical report №12 for Penza Oblast. These included the overall and primary incidence of mental and behavioral disorders (MBD), as well as substance use-related MBD (MBDSUR), as calculated per 100.

[Determining the level of occurrence of the lipid nucleus of atherosclerotic plaques in the abdominal aorta by means of infrared Fourier spectroscopy].

The article deals with the problem of diagnosis of atherosclerotic alterations in abdominal aorta wall in order to reduce atherosclerosis-related mortality. Targeted treatment requires determining the exact mechanism of development of atherosclerosis. Infrared Fourier spectroscopy is suggested as the most rapid and accurate method of diagnosis and analysis of the content of various organic compounds playing a particular role in the development of the atherosclerotic process.

[Blood acid-base balance of sportsmen during physical activity].

The aim of this study was to investigate the acid-base balance parameters in blood of sportsmen by physical activity. Before exercise lactate concentration in blood was normal. Carbon dioxide pressure (рСО2), bicarbonate concentration (НСО3 -), base excess (BE), were increased immediately after physical activity lactate concentration increased, while pH, BE, НСО3 -, рСО2 decreased in capillary blood of sportsmen.