Table 2.
Cardiovascular Parameters in Different Age Groups
| <30 Years | 30–60 Years | >60 Years | Significance | |
|---|---|---|---|---|
| Heart Rate Variability | ||||
| cvNN | 0.07 ± 0.02 | 0.05 ± 0.02 | 0.04 ± 0.02 | *, ††† |
| SDANN10 | 59.5 ± 22.7 | 47.3 ± 22.6 | 38.2 ± 18.8 | + |
| LF/HF ratio | 2.21 ± 2.19 | 3.22 ± 3.66 | 2.85 ± 3.42 | n.s. |
| FDRR | 1.09 ± 0.54 | 1.06 ± 0.38 | 1.22 ± 0.23 | n.s. |
| plvar10 | 0.019 ± 0.009 | 0.011 ± 0.034 | 0.033 ± 0.103 | + |
| QT interval parameters | ||||
| mean QT [ms] | 405.1 ± 57.8 | 411.5 ± 97.8 | 495.6 ± 115.8 | n.s. |
| Blood Pressure/Baroreflex | ||||
| Systolic BP [mmHg] | 120.4 ± 14.7 | 130.6 ± 23.2 | 130.7 ± 18.2 | * |
| Diastolic BP [mmHg] | 73.9 ± 9.9 | 86.3 ± 15.8 | 85.0 ± 12.4 | ***, ++ |
| tslope [ms/mmHg] | 21.1 ± 8.7 | 15.3 ± 7.2 | 10.8 ± 4.8 | ***, +++, † |
| JSDdiam | 0.022 ± 0.027 | 0.033 ± 0.030 | 0.047 ± 0.045 | ++ |
LF = low frequency band of heart rate variability; HF = high frequency band of heart rate variability; FD = fractal dimension; plvar10 = probability of low variability, time limit 10 ms; BP = blood pressure; tslope = tachycardic slope; JSD = joint symbolic dynamics. Data are presented as mean ± standard deviation. Significance levels: *P < 0.05; **P < 0.01; ***P < 0.001 for age groups <30 versus 30–60 years of age. The same levels apply to <30 versus >60 years of age (+) and 30–60 versus >60 years of age (†).