TABLE 4.
Age and gender matched reference values for pre-operative HRV parameters.
| Heart rate variability (HRV) | Healthy matched sample (n = 32)† | Rehab sample (n = 16): “pre-operative” | |||
| parameters | 24 h mean | [normalized 24 h mean; (z)] | |||
| Mean ± SD | Unit | mean [z] ± SD | T | P | |
| vagal activity (logRSArr) | 1,03 ± 0,23 | log(ms) | −0,28 ± 0,67 | −1,67 | 0.115 |
| Consecutive inter-beat intervals (RR) | 827,85 ± 99,76 | ms | −0,37 ± 0,89 | −1,69 | 0.112 |
| Heart rate (HR) | 75,08 ± 9,02 | bpm | 0,43 ± 0,96 | 1,78 | 0.096(*) |
| Standard deviation of RR (SDNN) | 49,64 ± 14,68 | ms | −0,01 ± 0,72 | −0,06 | 0.956 |
| Total variability power (InTOTrr) | 7,30 ± 0,61 | ln(ms2) | 0,00 ± 0,70 | 0,02 | 0.982 |
| Low frequency power (InLFrr) | 5,83 ± 0,72 | ln(ms2) | −0,10 ± 0,72 | −0,53 | 0.604 |
| High frequency power (InHFrr) | 4,55 ± 0,92 | ms2 | −0,03 ± 0,90 | −0,11 | 0.911 |
| Very low frequency power (InVLFrr) | 6,61 ± 0,56 | ms2 | 0,06 ± 0,71 | 0,37 | 0.719 |
| Ratio LF/HF | 1,28 ± 0,55 | [ ] | −0,08 ± 1,00 | −0,33 | 0.747 |
| Respiratory rate (ATMFrsa) | 16,98 ± 2,27 | fpm | 0,02 ± 0,57 | 0,15 | 0.884 |
†Age, 59.25 ± 10.34 (68.8% female).