Application of the Lomb-Scargle Periodogram to InvestigateHeart Rate Variability during Haemodialysis

Table 2

Comparison of results obtained from five different methods of RR editing (using 100 simulations with different random noise profiles) and asymmetric selection criteria (+32.5% or −24.5%).

	Method 1	Method 2	Method 3 (replacement)			Method 4	Method 5
	“Baseline”	“Rules”	Cubic spline	Linear	Mean	OUGP	EMD
Mean RR (sec)	0.94 ± 0.01	0.93 ± 0.01	0.94 ± 0.01	0.94 ± 0.01	0.94 ± 0.01	0.91 ± 0.01	0.92 ± 0.01
Range RR (sec)	0.64	0.72	0.74	0.73	0.73	0.59	0.81
LF (nu)	0.39 ± 0.04	0.41 ± 0.05	0.43 ± 0.05	0.44 ± 0.05	0.38 ± 0.04	0.43 ± 0.04	0.32 ± 0.04
HF (nu)	0.51 ± 0.04	0.48 ± 0.05	0.45 ± 0.04	0.43 ± 0.04	0.52 ± 0.04	0.55 ± 0.04	0.66 ± 0.04
LF/HF	0.77 ± 0.13	0.87 ± 0.18	0.97 ± 0.18	1.05 ± 0.19	0.75 ± 0.13	0.8 ± 0.13	0.48 ± 0.09
Total power (dB)	−19.08 ± 0.38	−19.49 ± 0.45	−18.42 ± 0.4	−18.87 ± 0.4	−19.59 ± 0.39	−19.57 ± 0.47	−17.97 ± 0.45
LF location (mHz)	95.0 ± 1.52	91.8 ± 15.38	72.5 ± 30.38	68.3 ± 31.28	91.0 ± 24.4	96.0 ± 0.92	94.9 ± 0.31
HF location (mHz)	273.1 ± 17.96	257.2 ± 53.17	156.3 ± 81.28	140.8 ± 74.37	248.2 ± 56.28	263.1 ± 46.44	275.0 ± 0.29
(Al/Ah)^2	1.15 ± 0.52	1.72 ± 0.78	1.33 ± 0.91	1.29 ± 1	1.52 ± 0.75	1.97 ± 0.89	0.75 ± 0.29
% of LF peak > FAP 10%	97	93	78	80	92	100	99
% of HF peak > FAP 10%	97	89	81	84	79	97	100

Data are presented as mean ± std.