SOVREMENNAYA PEDIATRIYA.2017.3(83):128-131; doi 10.15574/SP.2017.83.128

Syusyuka V. G.
Zaporozhye State Medical University, Ukraine

Objective of the work — to estimate heart rate variability parameters of mother and fetus and their mutual interference based on сardiointervalography.

Group of examined persons and methods of research. There were examined 56 pregnant women in ІІ and ІІІ trimesters. Estimation of heart rate variability of pregnant woman and her fetus was performed on BABY-Card fetal monitor (a portable electrocardiograph with the function of registration and analysis of fetus and mother's electrocardiogram), which was designed in the laboratory of diagnostic systems of the National Aerospace University «HAI-MEDICA» (Kharkiv). The estimation of the main parameters was performed according to the recommendations of the Working Group of European Association of Cardiologists on heart rate variability study.

Results of researches and their discussion. The interrelation was revealed based on the analysis of mother and fetus cardiorhythm regulation indices. Thus, the positive correlation occurred between indices characterizing general condition of regulation mechanisms: SDNN (r=+0.352, p<0.05) and СV (r=+0.408, p<0.05) as well as general spectrum power (r=+0.367, p<0.05) and VLF (r=+0.417, p<0.05). It should be noted that domination of VLF-component, revealed in 92.86% of pregnant women and in 94.64% of fetus, points the prevalence of neurohumoral mechanism in heart rhythm regulation. The domination of low-frequency peak: LF (vascular circuit) and HF (autonomous circuit) was determined only in 1.79% and 5.36% of pregnant women as well as in 3.57% and 1.79% of fetus correspondingly. Of course, the fetus heart rate variability analysis is not sufficient method of diagnostics of the fetus state, but availability of the changes and relations indicates that the mutual influence of regulation mechanisms of mother and fetus's hemodynamics, namely of neurohumoral link, occurs.

Conclusions. The results of performed research show that state of vegetative homeostasis of the majority of pregnant women (92.86%) and their fetuses (94.64%) is stipulated by prevalence of neurohumoral effect. During of mother and fetus cardiorhythm parameters estimation, there was determined the positive correlation between indices, characterizing the total rate of variability, as well as general spectrum power and VLF. The latter points the mutual influence of hemodynamical regulation mechanisms of mother and fetus.

Key words: pregnancy, fetus, heart rate variability, сardiointervalography.

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