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Heart Rate Variability Variables.
| Variable | Unit | Definition | Frequency Range |
|---|---|---|---|
| VLF | ms2 | The power value in the VLF frequency | 0.003~0.04 Hz |
| LF | ms2 | The power value in the LF frequency | 0.04~0.15 Hz |
| HF | ms2 | The power value in the HF frequency | 0.15~0.4 Hz |
| VLF (%) | % | VLF divided by the overall power value | |
| LF (%) | % | LF divided by the overall power value | |
| HF (%) | % | HLF divided by the overall power value |
