Table 2.
HRV frequency-domain measures.
| Parameter | Unit | Description |
|---|---|---|
| ULF power | ms2 | Absolute power of the ultra-low-frequency band (≤0.003 Hz) |
| VLF power | ms2 | Absolute power of the very-low-frequency band (0.0033–0.04 Hz) |
| LF peak | Hz | Peak frequency of the low-frequency band (0.04–0.15 Hz) |
| LF power | ms2 | Absolute power of the low-frequency band (0.04–0.15 Hz) |
| LF power | nu | Relative power of the low-frequency band (0.04–0.15 Hz) in normal units |
| LF power | % | Relative power of the low-frequency band (0.04–0.15 Hz) |
| HF peak | Hz | Peak frequency of the high-frequency band (0.15–0.4 Hz) |
| HF power | ms2 | Absolute power of the high-frequency band (0.15–0.4 Hz) |
| HF power | nu | Relative power of the high-frequency band (0.15–0.4 Hz) in normal units |
| HF power | % | Relative power of the high-frequency band (0.15–0.4 Hz) |
| LF/HF | % | Ratio of LF-to-HF power |