Table 2. HRV parameters of patients with survival and with mortality before and after hemodialysis.

HRV parameters (frequency domain)	Survival		Mortality
	Before hemodialysis	After hemodialysis	Before hemodialysis	After hemodialysis
VLF (ms2)	4.07 ± 0.12	4.61 ± 0.13**	3.99 ± 0.34	3.96 ± 1.04
LF (ms2)	2.34 ± 0.28	2.84 ± 0.38	2.00 ± 1.01	2.53 ± 1.19
HF (ms2)	2.25 ± 0.31	2.35 ± 0.42	1.97 ± 1.13	3.53 ± 0.46
LF% (nu)	39.13 ± 1.80	47.28 ± 1.80**	38.33 ± 4.37	35.51 ± 4.15
HF% (nu)	33.53 ± 1.30	29.61 ± 1.16*	34.46 ± 3.02	31.35 ± 2.30
LF/HF	0.09 ± 0.10	0.48 ± 0.09**	0.02 ± 0.25	-0.07 ± 0.19

^*p < 0.05, ^**p < 0.001 compared to patients before hemodialysis.

Abbreviations are the same as in Table 1.