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. 2002 Aug 15;543(Pt 1):337–348. doi: 10.1113/jphysiol.2001.013398

Table 2.

Spectral analysis of R–R interval and arterial pressure variability before and after ganglion blockade

Very low frequency Low frequency High frequency
Baseline Blockade P Baseline Blockade P Baseline Blockade P
R–R (ms2) 740 ± 162 5 ± 1 0.001 718 ± 130 1 ± 0 <0.001 367 ± 87 4 ± 1 0.003
SBP (mmHg2) 11.4 ± 2.6 1.8 ± 0.4 0.004 4.5 ± 1.0 1.4 ± 0.7 0.003 1.1 ± 0.3 1.2 ± 0.3 0.729
DBP (mmHg2) 4.2 ± 1.0 1.3 ± 0.3 0.006 2.3 ± 0.5 0.5 ± 0.2 0.008 0.3 ± 0.1 0.2 ± 0.1 0.343

n = 10, values are presented as means ± s.e.m. Very low frequency range, 0.0078–0.05 Hz; low frequency range, 0.05–0.15 Hz; high frequency range, 0.15–0.35 Hz.