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By analyzing the distribution of cardiac heart rate wavelengths by normalized median spectrogram, we found that normalized spectral power in the range of low heart rate rhythms at orthodontic tests in men and women significantly differed at frequencies of 0.08 and 0.1 Hz. The latter can testify to the sexual characteristics of spontaneous baro-reflex sensitivity, a

The presence of two peaks can indicate two impacts on the heart rate spectrograph. Yes, there are two theories of wave formation in the low frequency region. The first is the effect of the functioning of the baroreflector mechanism of regulation of arterial pressure [60], and the second is the influence of the endogenous rhythm generator. In studies by Cooley et al. [27] evaluated the spectra of fluctuations in blood pressure and RR intervals in patients with implanted artificial left ventricle. After a short time after implantation (1 and 15 months), there were no slow waves in the arterial pressure spectra, and in the spectra of RR-intervals of their own heart, slow fluctuations "became apparent and dominant." The endogenous oscillator is likely to capture the rhythm of waves caused by the activity of the baro-reflex mechanism, which is a manifestation of the fundamental natural synchronization phenomenon [61], and in this case, the frequency of both the baroreflex and the oscillator is the same

A probable increase in the level of blood pressure in the 3rd phase compared with the 2nd and even the greater is the phase I, indicating an increase in the tone of the sympathetic department of the autonomic nervous system and is consistent with the literature data (Princi et al., 2005). Some authors [52] point out the individual peculiarities of autonomic regulation in women and predict the relative stability of the type of autonomous regulation and its genetic determinism. However, there are certain contradictions. Thus, Japanese scientists [43] observed an increase in the value of LF, which reflects the effect of both the sympathetic and

But Princi and sang. (Princi et al., 2005) found opposite data, that is, the growth of LF in phase I and its decline in III. But only six women were screened and therefore, in our opinion, data for statistical processing are not enough. Lucini and sang (Lucini et al., [6]) noted an increase in blood pressure in the 2nd phase. In this case, the content of sex hormones did not change. It is also noted that the HRV indices did not change in any phase of CMC. However, a correlation between the content of estrogen and the absolute peak of HRV in the 2nd phase was identified. The found correlation is attributed to the cardiotropic effect of sex hormones. The autonomic nervous system plays a significant role in the processes of adaptation of the organism, and resulting in its functional state is very variable. Dependence of types of hemodynamics from the initial vegetative tone is considered in some diseases of the cardiovascular system. Establishing this relationship in the norm allows us to clarify algorithms for diagnosing the adaptive capacity of the organism, since they depend not only on the initial level of functioning of the system and functional reserves, which are most often used in medical-pedagogical control and preventive medicine, but also from the level of voltage regulatory systems, which

In our study, we measured the level of vegetative tone with the HFnorm. Analysis of the distribution of this indicator in the first phase of CMC allowed to distinguish three typological

parasympathetic VSS on the level of AT in both I and II phases.

certain difference in the genesis of these waves.

or slightly different.

20 Highlights on Hemodynamics

is practically not taken into account.

Olena Lutsenko

Address all correspondence to: olena85lutsenko@gmail.com

Department of Theory and Methods of Teaching of Natural Sciences, Hlukhiv National Pedagogical University of Alexander Dovzhenko, Hlukhiv, Ukraine
