Nicotine Ingestion Reduces Heart Rate Variability in Young Healthy Adults

Table 1

Definition of the measurements involved in this study.

Name	Unit	Definition
LF power	ms^2	Power in low frequency range (mainly represents SNS activity)
HF power	ms^2	Power in high frequency range (mainly represents PNS activity)
LF (nu)	n.u.	LF in normalized units:
HF (nu)	n.u.	HF in normalized units:
BMI	Kg/ms^2	Body mass index: body mass (kg)/height (m)^2
HR	BPM	Heart rate
RMSSD	ms	The square root of the mean of the sum of the squares of differences between adjacent NN intervals
SDNN	ms	Standard deviation of all NN intervals

The LF (nu) and HF (nu) were assessed for HRV analysis in this experiment.