Table 2 Heart rate variability variables.
From: The physiological measurement and evaluation of empathy of video content
Variable | Unit | Definition |
|---|---|---|
SDNN | msec2 | Standard deviation of NN Intervals |
RMSSD | msec2 | Root mean square of successive differences |
Total power | msec2 | Total power of the heart rate signal across all frequency components within 0.04 ~ 0.4 Hz frequency range |
