Table 5.

Heart rate variability indices in patients with congestive heart failure and age-matched controls.

	CHF (NS; n = 39)	CHF (SV; n = 69)	Control (n = 90)	P value NS–SV	P value NS–C	P value SV-C
Mean NN, ms	758 ± 114	755 ± 140	782 ± 110	0.99	0.56	0.37
SDNN, ms	59.1 ± 31.1	59.7 ± 39.6	93.4 ± 29.0	0.99	<0.001	<0.001
SDANN, ms	33.0 ± 27.2	37.7 ± 33.6	51.6 ± 30.0	0.73	0.006	0.016
RMSSD, ms	37.6 ± 40.0	40.0 ± 48.3	24.5 ± 12.8	0.94	0.13	0.017
ln HF, ln ms2	5.43 ± 1.57	5.30 ± 1.67	5.13 ± 1.12	0.89	0.82	0.75
ln LF, ln ms2	4.97 ± 1.80	4.85 ± 1.63	5.97 ± 1.01	0.90	0.001	<0.001
ln VLF, ln ms2	5.73 ± 1.36	6.04 ± 1.45	7.33 ± 0.83	0.40	<0.001	<0.001
ln ULF, ln ms2	5.73 ± 1.23	6.04 ± 1.45	8.81 ± 0.64	0.66	<0.001	<0.001
LF/HF ratio	0.83 ± 0.79	0.93 ± 0.78	3.01 ± 2.31	0.95	<0.001	<0.001
DC, ms	3.39 ± 1.60	3.84 ± 2.01	5.87 ± 1.70	0.43	<0.001	<0.001
AC, ms	−4.34 ± 2.29	−4.69 ± 2.13	−6.27 ± 1.96	0.68	<0.001	<0.001
α1	0.79 ± 0.26	0.72 ± 0.24	1.17 ± 0.25	0.44	<0.001	<0.001
α2	0.93 ± 0.16	1.00 ± 0.21	1.18 ± 0.08	0.048	<0.001	<0.001
λ25s	0.57 ± 0.18	0.48 ± 0.15	0.40 ± 0.08	<0.001	<0.001	<0.001
λ2-slope	−0.21 ± 0.23	−0.13 ± 0.18	−0.02 ± 0.08	0.03	<0.001	<0.001

P< 0.05.