Table 2.

Sympathetic tone, as measured by baseline plasma catecholamine levels and 24-h heart rate variability, in endstage renal disease (ESRD) patients and controls.

	Controls (n = 10)	ESRD (n = 10)
Plasma catecholamine levels
Norepinephrine, nmol/L	1.6 ± 0.4	5.8 ± 0.6*
Epinephrine, pmol/L	342 ± 75	742 ± 281
Heart rate variability
SDNN, ms	126.4 ± 19	100.2 ± 12*
SDANN, ms	121 ± 20	95.7 ± 10
RMSSD, ms	27.1 ± 8	15.7 ± 2*
Triangular index	33.6 ± 4	25.7 ± 3*

Values are means ± SEM. *P < 0.05.