Table 2.

Comparisons of time domain analysis measurements of control and patient groups prior to and after the procedure and six months later

Parameters	Control	Initial	P0	One day after intervention	P1	P2	At 6. month	P3	P4
SDNN≠	137.50±42.50	90.25±28.14	0.001	108.30±26.23	0.001	0.01	145±0.84	0.713	0.001
rMSSD≠	58.14±28.49	42.29±22.37	0.029	59.03±27.39	0.998	0.486	72.18±48.22	0.448	0.016
NN≠	664.29±81.29	634.40±88.94	0.356	689.38±101.48	0.353	0.001	709.11±66.04	0.136	0.002
pNN50%≠	17.90±11.25	10.90±7.31	0.011	18.42±11.62	0.987	0.023	19.9±12.94	0.712	0.001
SDNN≠ index	58.26±19.13	42.36±15.51	0.001	56.45±21.34	0.904	0.248	62.26±20.64	0.673	0.001
SDANN≠	122.40±41.0	77.00±26.41	0.001	88.25±25.84	0.001	0.003	125.13±13.50	0.802	0.001

NN - the average of RR intervals; P0 - p value between the values prior to the procedure in the patient and control groups; P1-p values between the values one day after the procedure in the patient and control groups; P2 - p values between the values prior to and one day after the procedure in the patients, P3 - p values between the control group and values of patients at the sixth month; P4 - comparison of values prior to the procedure and at the sixth month; pNN50%-the proportion of adjacent RR intervals that differ by more than 50 ms in the 24-h recording; RMSSD - the square root of the mean of the sum of the squares of differences between adjacent RR intervals; SDANN - the standard deviation of the means of all the five-minute segment normal RR intervals; SDNN - the standard deviation of all the normal RR intervals; SDNN index-the mean of all the five-minute standard deviations of normal RR intervals during the 24-h period. Student’s t-test was used.