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

Table 3

Comparison of results obtained from 5 different methods of RR editing (using 100 simulations with different random noise profiles) and symmetrical selection criteria of ±10%.

	Method 1	Method 2	Method 3 (replacement)			Method 4	Method 5
	“Baseline”	“Rules”	Cubic spline	Linear	Mean	OUGP	EMD
Mean RR (sec)	0.92 ± 0.01	0.92 ± 0.01	0.92 ± 0.01	0.92 ± 0.01	0.92 ± 0.01	0.91 ± 0.01	0.92 ± 0.01
Range RR (sec)	0.67	0.74	0.75	0.74	0.74	0.59	0.85
LF (nu)	0.38 ± 0.05	0.41 ± 0.04	0.41 ± 0.05	0.43 ± 0.05	0.38 ± 0.05	0.43 ± 0.04	0.32 ± 0.04
HF (nu)	0.52 ± 0.04	0.5 ± 0.04	0.48 ± 0.04	0.45 ± 0.04	0.53 ± 0.04	0.55 ± 0.04	0.62 ± 0.04
LF/HF	0.74 ± 0.14	0.83 ± 0.15	0.88 ± 0.17	0.96 ± 0.19	0.73 ± 0.14	0.79 ± 0.14	0.52 ± 0.09
Total power (dB)	−18.07 ± 0.41	−19.29 ± 0.44	−18.08 ± 0.39	−18.51 ± 0.39	−19.21 ± 0.4	−19.51 ± 0.49	−17.64 ± 0.43
LF location (mHz)	96.5 ± 14.37	94.3 ± 5.18	75.4 ± 37.93	73.2 ± 36.96	92.2 ± 25.19	95.0 ± 0.36	95.0 ± 0.31
HF location (mHz)	273.3 ± 16.34	267.8 ± 32.14	165.9 ± 83.31	163.9 ± 85.46	249.7 ± 59.68	275.0 ± 0.28	275.0 ± 0.28
(Al/Ah)^2	1.13 ± 0.57	1.68 ± 0.65	1.32 ± 0.9	1.31 ± 0.98	1.44 ± 0.76	1.21 ± 0.49	0.78 ± 0.3
% 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.