Table 1 HRV variables that were collected and derived from Laborde et al. [26]
Domain | Variable | Description | Physiological origin |
|---|---|---|---|
Time-domain | RMSSD | Root Mean Square of Successive Differences | Vagal Tone |
pNN50 | Percentage of successive normal sinus RR intervals more than 50ms | Vagal Tone | |
Frequency-domain | HF | High Frequencies | Vagal Tone |
LF/HF | Low Frequencies/ High Frequencies Ratio | Mix of sympathetic and vagal activity |