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Frequency domain features of HRV.
| Features | Description |
|---|---|
| VLF power | Power in very low frequency range (0.003–0.04 Hz) |
| LF power | Power in low frequency range (0.04–0.15 Hz) |
| HF power | Power in high frequency range (0.15–0.4 Hz) |
| Total power | Power in very low frequency range (0.003–0.4 Hz) |
| LF/HF Ratio | LF/HF |
| Respiratory rate power | Maximum power in frequency range (0.1–0.25 Hz) |
