The results of correlation rhythmography studies are given. She presents a method for visualizing and analyzing heart rate variability based on the construction of a two-dimensional graph. Correlation rhythmography (scatterography) plays an important role in the comprehensive analysis of the results of the study of the heart rate of the reindeer, as it is a mobile indicator of the general condition of the animal. According to the research methodology, the Evenki deer were divided into groups based on the results of the electrocardiogram analysis. The "cloud" of phase coordinates is "more dense" in normotonic deer. Such fixation of cardiac intervals shows a high degree of heart rate variability, weak centralization of its control, as well as the predominance of an autonomous regulation circuit. For another group of deer, there is a high number of dots, as well as a decrease in cloud size. This shows a high degree of centralization of heart rate control, the predominance of the action of the central control circuit. Getting points far from each other and a strong increase in the size of the cloud indicates abnormalities in the functioning of the cardiovascular system (arrhythmia, chronic heart failure) the corresponding deer group. Since the variational analysis of the heart rhythm makes it possible to differentiate the degree of tension of the tone of the sympathetic and parasympathetic parts of the autonomic nervous system, it can be concluded that scatterograms are an indicative visual method of heart rate variability.

Stepura Evgeniy E., Fedorov Valery I., Dmitrieva Tuyara I.

1. Emelyanova A. S., Nikitov S. V. Analysis of the relationship between the primary indicators of variation pulseograms of cows and milk productivity when using the additive "Vitartil". Izvestiya Orenburgskogo gosudarstvennogo agrarnogo universiteta, 2012;3:250–251. EDN PBPEOF (in Russ.).
2. Emelyanova A. S., Stepura E. E., Gerasimov M. A. Analysis of vegetative tone of Jersey cows. Proceedings from Agro-industrial complex: contours of the future: IX Mezhdunarodnaya nauchno-prakticheskaya konferentsiya. (PP. 248–252), Kursk, Kurskaya gosudarstvennaya sel'skokhozyaistvennaya akademiya, 2018. EDN RZQFJR (in Russ.).
3. Naumov M. M., Emelyanova A. S., Stepura E. E., Pakhomov V. A. Electrophysiological parameters of heart rate variability in Jersey cows. Vestnik Kurskoi gosudarstvennoi sel'skokhozyaistvennoi akademii, 2022;6:97–103. EDN BMRPDN (in Russ.).
4. Stepura E. E. Analysis of electrophysiological parameters of heart rate variability in animals with different vegetative status. Vestnik Moskovskogo gorodskogo pedagogicheskogo universiteta. Seriya: Estestvennye nauki, 2022;2(46):8–16. doi: 10.25688/2076-9091.2022.46.2.01. EDN TKHIXA (in Russ.).
5. Stepura E. E. Analysis of the dynamic series of secondary indicators of variation pulsograms of Jersey cows. Estestvennye i tekhnicheskie nauki, 2017;6(108):28–31. EDN YTVWDF (in Russ.).
6. Stepura E. E. Analysis of heart rate variability indicators of Jersey cows. Vestnik Orenburgskogo gosudarstvennogo universiteta, 2017;11(211):110–114. EDN YLQIEY (in Russ.).
7. Emelyanova A. S., Stepura E. E. Initial vegetative tone of Jersey cows based on the stress index and its analysis. Estestvennye nauki, 2017;4(61):128–133 EDN YOOVCW (in Russ).