. 2016 Nov 22;7:557. doi: 10.3389/fphys.2016.00557

Table 2.

HRV indices calculated in HRVanalysis program.

				Analysis type
Index	Unit	Entire	Day/Night	Selected area	Along time	Arround events	Sequencial epoch
TEMPORAL
Mean RR	ms	x	x	x	x	x	x
Mean frequency	bpm	x	x	x	x	x	x
NN20	n	x	x	x			x
pNN20	%	x	x	x			x
NN30	n	x	x	x			x
pNN30	%	x	x	x			x
NN50	n	x	x	x			x
pNN50	%	x	x	x			x
SDNN	ms	x	x	x			x
rMSSD	ms	x	x	x			x
SDANN	ms	x	x
SDNNIDX	ms	x	x
GEOMETRICAL
Triangular Index		x	x	x			x
TINN	ms	x	x	x			x
X	ms	x	x	x			x
Y	n	x	x	x			x
M	ms	x	x	x			x
N	ms	x	x	x			x
FREQUENCY
Ptot	ms²/Hz	x	5 min	x			x
ULF	ms²/Hz	x
VLF	ms²/Hz	x	5 min	x			x
LF	ms²/Hz	x	5 min	x			x
HF	ms²/Hz	x	5 min	x			x
LF/HF	–		5 min	x			x
LFnu	%		5 min	x			x
HFnu	%		5 min	x			x
EMPIRICAL MODE DECOMPOSITION
pLF1		5 min	5 min	x			x
pLF2		5 min	5 min	x			x
pHF1		5 min	5 min	x			x
pHF2		5 min	5 min	x			x
IMAI1		5 min	5 min	x			x
IMAI2		5 min	5 min	x			x
WAVELET
Ptot	ms²/Hz				x
ULF	ms²/Hz
VLF	ms²/Hz				x
LF	ms²/Hz				x	x
HF	ms²/Hz				x	x
LF/HF	–				x	x
LFnu	%				x	x
HFnu	%				x	x
POINCARÉ PLOT
Centroïd	ms	x	x	x			x
SD1	ms	x	x	x			x
SD2	ms	x	x	x			x
SD1/SD2	–	x	x	x			x
SD1nu	%	x	x	x			x
SD2nu	%	x	x	x			x
FRACTAL
α1_DFA		5000 beats	5000 beats	x			x
α2_DFA		5000 beats	5000 beats	x			x
H_DFA		5000 beats	5000 beats	x			x
Hurst		5000 beats	5000 beats	x			x
H_Higuchi		5000 beats	5000 beats	x			x
H_Katz		5000 beats	5000 beats	x			x
1/f slope		x	x	x			x
MOMENTS
Skewness		5000 beats	5000 beats	x			x
Kurtosis		5000 beats	5000 beats	x			x
Largest Lyapunov exponent				x			x
ENTROPY
Approximate entropy		1000 beats	1000 beats	x			x
Sample entropy		1000 beats	1000 beats	x			x
Shanon Entropy (SE)		300 beats	300 beats	x			x
Conditional Entropy (CE)		300 beats	300 beats	x			x
Corrected CE (CCE)		300 beats	300 beats	x			x
Normalized CCE (NCCE)		300 beats	300 beats	x			x
ρ		300 beats	300 beats	x			x
Lempel-Ziv complexity		1000 beats	1000 beats	x			x
TURBULENCE
VPC	n	x
Turbulenve onset	%	x
Turbulence slope	ms/nRR	x
DC/AC
Acceleration capacity	ms	x
Deceleration capacity	ms	x
SYMBOLIC DYNAMIC
0V		300 beats	300 beats	x			x
0V%		300 beats	300 beats	x			x
1V		300 beats	300 beats	x			x
1V%		300 beats	300 beats	x			x
2LV		300 beats	300 beats	x			x
2LV%		300 beats	300 beats	x			x
2UV		300 beats	300 beats	x			x
2UV%		300 beats	300 beats	x			x
MP		300 beats	300 beats	x			x
MP%		300 beats	300 beats	x			x

When specified, the value of several indices is calculated as the mean of the successive epochs of indicated length (time duration or number of beats).