Table 2 Spectral power analysis of the heart rate (HR) in normotensive intact and gonadectomised rats
From: Impact of gonadectomy on blood pressure regulation in ageing male and female rats
Variable | F-INTACT (n = 7) | F-GONADX (n = 7) | M-INTACT (n = 8) | M-GONADX (n = 5) | Two-way ANOVA |
|---|---|---|---|---|---|
TP bpm2/Hz | 4.0 ± 1.3 | 6.3 ± 1.2 | 4.6 ± 1.1 | 3.3 ± 1.4 | NS |
VLF bpm2/Hz (0–0.26 Hz) | 2.8 ± 0.5 | 2.8 ± 0.5 | 2.3 ± 0.4 | 1.7 ± 0.6 | NS |
LF bpm2/Hz (0.26–0.76 Hz) | 0.5 ± 0.2 | 1.0 ± 0.2 | 0.6 ± 0.2 | 0.5 ± 0.2 | NS |
HF bpm2/Hz (0.76–3.3 Hz) | 0.7 ± 0.1 | 2.5 ± 1.1 | 1.8 ± 0.7 | 1.1 ± 0.4 | NS |
LF:HF | 0.7 ± 0.1 | 0.6 ± 0.1 | 0.5 ± 0.1 | 0.6 ± 0.1 | NS |
VLF % (HR) | 68.1 ± 7.6 | 55.0 ± 7.1 | 53.3 ± 6.6 | 53.4 ± 8.4 | NS |
LF % (HR) | 12.0 ± 2.2 | 15.0 ± 2.0 | 12.6 ± 1.9 | 15.4 ± 2.4 | NS |
HF % (HR) | 11.6 ± 6.8 | 29.9 ± 6.3 | 34.6 ± 5.9 | 31.2 ± 7.5 | NS |