Table 2.
Cardiac and peripheral autonomic modulation
| Variable | Normotensive (n = 13) | Prehypertensive (n = 11) | p |
|---|---|---|---|
| Cardiac Modulation | |||
| VarianceIRR (ms2) | 2050 [985-3264] | 1718 [1067-3806] | 0,50b |
| VLFiRR (ms2) | 905 ± 699 | 1178 ± 625 | 0,33a |
| LFiRR (ms2) | 565 [277-1067] | 413 [263-1360] | 0,98b |
| HFiRR (ms2) | 481 [212-897] | 340 [195-606] | 0,54b |
| LFiRR (un) | 51 ± 19 | 57 ± 17 | 0,46a |
| HFiRR (un) | 49 ± 19 | 43 ± 17 | 0,46a |
| LF/HF | 0,90 [0,58-1,87] | 1,52 [0,98-1,91] | 0,50b |
| Peripheral modulation | |||
| Variance SBP (mmHg2) | 9,4 [ 4,9-12,7] | 18,3 [ 14,8-26,7] | < 0,01b |
| VLFSBP (mmHg2) | 6,9 [2,0-11,1] | 13,5 [10,7-22,4] | 0,01b |
| LFSBP (mmHg2) | 1,7 [1,0-3,0] | 3,0 [2,0-4,0] | 0,04b |
| HFSBP (mmHg2) | 2,0 [1,0-2,0] | 1,0[1,0-2,5] | 0,77b |
| Breathing | |||
| LF (un) | 0 [ 0-6] | 0 [ 0-12] | 0,92b |
| HF (un) | 100 [94-100] | 100 [88-100] | 0,92b |
Data presented as mean ± standard deviation of mean or median [interquartile range];
a
unpaired Student t test;
b
Mann-Whitney U-test; iRR: RR interval; SBP: systolic blood pressure; VLF : very low frequency; LF: low frequency; HF: high frequency; un: standard units.