Heart-rate variability parameters in conscious sham and TAC mice during the daytime
| Parameter | Sham (n = 7) | HF (n = 5) | ||||
|---|---|---|---|---|---|---|
| Basal | ANS inhibition | Basal | ANS inhibition | |||
| Time domain parameters | ||||||
| SDNN (ms) | 8.83 ± 2.51 | 2 ± 0.66b | 6.89 ± 2.64 | 3.9 ± 2.55 | ||
| RMSSD (ms) | 5.03 ± 1.69 | 2.4 ± 0.89b | 3.38 ± 2.21 | 3.95 ± 2.97 | ||
| pNN5 (%) | 22.5 ± 13.76 | 0.35 ± 0.47b | 3.52 ± 2.68a | 1.49 ± 2.79 | ||
| Frequency parameters | ||||||
| VLFreq/total (nu) | 58.5 ± 2.64 | 48.2 ± 16.13 | 64.6 ± 4.25 | 37.9 ± 5.36b | ||
| LFreq normalization (nu) | 66.2 ± 11.37 | 27.4 ± 13.76b | 76.3 ± 5.59 | 53.4 ± 25.04b,a | ||
| HFreq normalization (nu) | 33.8 ± 11.37 | 72.6 ± 13.76b | 23.7 ± 5.59 | 46.6 ± 25.04b,a | ||
| LFreq/HFreq (nu) | 2.79 ± 1.13 | 0.43 ± 0.29b | 3.61 ± 1.18 | 0.82 ± 0.47 | ||
| Parameter | Sham ( | HF ( | ||||
|---|---|---|---|---|---|---|
| Basal | ANS inhibition | Basal | ANS inhibition | |||
| SDNN (ms) | 8.83 ± 2.51 | 2 ± 0.66 | 6.89 ± 2.64 | 3.9 ± 2.55 | ||
| RMSSD (ms) | 5.03 ± 1.69 | 2.4 ± 0.89 | 3.38 ± 2.21 | 3.95 ± 2.97 | ||
| pNN5 (%) | 22.5 ± 13.76 | 0.35 ± 0.47 | 3.52 ± 2.68 | 1.49 ± 2.79 | ||
| VLFreq/total (nu) | 58.5 ± 2.64 | 48.2 ± 16.13 | 64.6 ± 4.25 | 37.9 ± 5.36 | ||
| LFreq normalization (nu) | 66.2 ± 11.37 | 27.4 ± 13.76 | 76.3 ± 5.59 | 53.4 ± 25.04 | ||
| HFreq normalization (nu) | 33.8 ± 11.37 | 72.6 ± 13.76 | 23.7 ± 5.59 | 46.6 ± 25.04 | ||
| LFreq/HFreq (nu) | 2.79 ± 1.13 | 0.43 ± 0.29 | 3.61 ± 1.18 | 0.82 ± 0.47 | ||
SDNN, standard deviation of the number of pairs of successive NN (Normal to Normal RR intervals); RMSSD, root mean square of the successive differences; PNN5, the proportion of the number of pairs of successive NN (R-R) intervals that differ by >5 ms divided by the total number of NN (R-R) intervals. In frequency parameters, the measures shown are the normalized power (NORM) for each band (very low frequency, VLFreq; low frequency, LFreq; and high frequency, HFreq) and the ratio of LFreq to Hfreq. Two-way repeated ANOVA followed by Bonferroni test were used. All values are mean ± SD.
P < 0.05 versus sham group.
P < 0.05 versus the same group under basal conditions.
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