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Table 1 Heart rate variability parameters obtained from stationary analysis in SinusCor

From: SinusCor: an advanced tool for heart rate variability analysis

Index

Description

Time domain

 RMSSD (ms)

Root mean squared of successive NN differences

 SDNN (ms)

Standard deviation of NN intervals

 pNN50 (%)

Percentage of successive NN differences greater than 50 ms

 NN50

Count of successive NN differences greater than 50 ms

 Mean RRi (ms)

Mean of RRi values

 Mean HR (bpm)

Mean of HR values

Frequency domain

 Total power (ms2)

Energy of the PSD from 0 to 0.4 Hz (adjustable) in absolute values

 VLF (ms2)

Energy of the PSD from 0 to 0.04 Hz (adjustable) in absolute values

 LF (ms2)

Energy of the PSD from 0.04 to 0.15 Hz (adjustable) in absolute values

 HF (ms2)

Energy of the PSD from 0.15 to 0.4 Hz (adjustable) in absolute values

 LF/HF

Ratio of LF to HF

 LFn.u

LF energy normalized by total power and VLF

 HFn.u

HF energy normalized by total power and VLF