Table 3.
Time domain indices of HRV recorded in supine position of normotensive and prehypertensive offspring of hypertensive parents.
| Parameters | Normotensive offspring | Prehypertensive offspring | P values | ||
|---|---|---|---|---|---|
| Group I | Group II | Group III | Group IV | ||
| (n = 45) | (n = 68) | (n = 32) | (n = 20) | ||
| Mean RR (s) | 0.845 ± 0.146 | 0.856 ± 0.151 | 0.774 ± 0.140# | 0.786 ± 0.142 | 0.0313 |
| RMSDD (ms) | 26.65 ± 11.30 | 27.20 ± 12.20 | 19.80 ± 9.70*,## | 23.30 ± 10.30 | 0.0151 |
| NN50 | 21.70 ± 8.40 | 22.10 ± 10.10 | 18.80 ± 7.40 | 21.90 ± 8.50 | 0.3663 |
| pNN50 | 6.02 ± 3.05 | 6.40 ± 3.10 | 4.70 ± 2.35 | 5.65 ± 2.50 | 0.0546 |
Data presented are mean ± SD; Group I: normotensive offspring of both parents hypertensive; Group II: normotensive offspring of one parent hypertensive; Group III: prehypertensive offspring of both parents hypertensive; Group IV: prehypertensive offspring of one parent hypertensive; the *mark indicates comparison with Group I, and the #mark indicates comparison with group II. *P < 0.05; # P < 0.05; ## P < 0.01.