[HEART RATE VARIABILITY IN CHILDREN WITH FALSE CHORDS IN THE LEFT CARDIAC VENTRICULAR].

We examined 64 children with false tendons in the left cardiac ventricular. The research included evaluation of time and frequency domain parameters of the heart rhythm with cardiointervalography. The parameter changes were noted. Thus, sympathetic vegetative system (VS) part prevalence was present in boys and characterized by decreasing of SDNN when compared with control data (85,4±5,8 и 158,2 ±25,6, р<0,05). rMSSD and PNN50%, which are responsible for parasympathetic VS part have the tendency to increasing in girls. Nevertheless, frequency domain analysis showed an increasing of the total spectrum power (TP) in both subgroups with statistically significant result (4734,2±319,4 and 3520±381 - boys, р<0,05 when compared with control; 4961,7±413,7 and 3520±381, р<0,05 - girls, respectively). That was proved by other parameters. VLF were also increased when compared with control group (4188,4±413,1 and 1717±154, р<0,05 - boys; 3050,5±468,1 and 1433±811 - girls, р<0,05, respectively), which characterizes sympathetic VS part prevalence in both subgroups. Other frequency domain parameters statistically were not changed but they had tendency as to increasing as to decreasing. All previously noted shows the sympathicotonia in children with FT. These children should be under observation of pediatricians and child cardiologists.