Skip to main content

Table 3 Volunteer’s cardiovascular autonomic parameters evaluated at rest and supine positions

From: Important differences between hypertensive middle-aged women and men in cardiovascular autonomic control—a critical appraisal

  Women Men Sex factor Hypertension factor Interaction
Normotensive Hypertensive Normotensive Hypertensive F(d.f) P F(d.f) P F(d.f) P
Heart rate variability
 RRi 784 ± 23 793 ± 13 810 ± 25 953 ± 74 F(1,99):1.1 0.300 F(1,99):0.04 0.840 F(1,99):0.06 0.813
 Variance, ms2 2209 ± 1219 1303 ± 697 2199 ± 1657 829 ± 493 F(1,99):1.2 0.279 F(1,99):26.1 < 0.001 F(1,99):1.08 0.300
 LF, ms2 643 ± 371 344 ± 206 885 ± 866 305 ± 215 F(1,99):1.05 0.308 F(1,99):19.7 < 0.001 F(1,99):2.01 0.159
 HF, ms2 1044 ± 801 474 ± 320 635 ± 726 173 ± 148 F(1,99):9.6 0.003 F(1,99):20.7 < 0.001 F(1,99):0.21 0.649
 LF, nu 43 ± 17 44 ± 16 61 ± 21 64 ± 16 F(1,99):30.2 < 0.001 F(1,99):0.4 0.512 F(1,99):0.12 0.736
 HF, nu 57 ± 17 56 ± 16 39 ± 21 36 ± 16 F(1,99):30.2 < 0.001 F(1,99):0.4 0.512 F(1,99):0.12 0.736
 LF/HF ratio 0.91 ± 0.6 0.99 ± 0.9 2.35 ± 2 2.52 ± 1.9 F(1,99):24.1 < 0.001 F(1,99):0.2 0.669 F(1,99):0.02 0.900
Blood pressure variability
 Variance, mmHg2 24 ± 18 25 ± 9.52 19 ± 12 27 ± 18.7 F(1,99):0.3 0.581 F(1,99):2.2 0.139 F(1,99):1,28 0.260
 LF, mmHg2 7 ± 6.2 6 ± 2.7 6 ± 4.8 8 ± 5.8 F(1,99):0.45 0.496 F(1,99):0.09 0.758 F(1,99):2.1 0.150
Baroreflex sensitivity
 Baroreflex sequences 87 ± 20 98 ± 14 85 ± 16 76 ± 48 F(1,99):4.5 0.036 F(1,99):0.02 0.895 F(1,99):3.26 0.074
 BEI 0.73 ± 0.16 0.61 ± 0.13 0.64 ± 0.14 0.47 ± 0.19 F(1,99):14.1 < 0.001 F(1,99):21.3 < 0.001 F(1,99):0.82 0.366
 Gain, ms/mmHg 14.5 ± 5.7 8.7 ± 4.1 13.1 ± 9.7 6.6 ± 2.7 F(1,99):2.1 0.153 F(1,99):24.7 < 0.001 F(1,99):0.10 0.749
 Up, ms/mmHg 13.8 ± 5.9 8.4 ± 3.9 12.7 ± 10.1 6.5 ± 3 F(1,99):1.4 0.245 F(1,99):21.1 < 0.001 F(1,99):0.10 0.752
 Down, ms/mmHg 14.8 ± 5.6 9.1 ± 4.5 13.4 ± 0.6 6.7 ± 2.5 F(1,99):2.5 0.120 F(1,99):25.6 < 0.001 F(1,99):0.18 0.673
  1. Data presented as mean ± SD
  2. RRi R-R intervals, ms milliseconds, LF low-frequency band, HF high-frequency band, nu normalized units, mmHg mercury millimeters, BEI baroreflex effectiveness index, ms/mmHg milliseconds/millimeter of mercury, up baroreflex sequence with progressive increases in blood pressure followed by progressive increases in pulse interval, down baroreflex sequence with progressive decreases in blood pressure followed by progressive decreases in pulse interval, F factor, d.f. degrees of freedom