Frequency Domain

Name	Definition
VLF	The Very Low Frequency (VLF) as defined in the Variability Analysis Frequency Domain Frequency Bins over the user-defined Segment Duration
LF	The Low Frequency (LF) as defined in the Variability Analysis Frequency Domain Frequency Bins over the user-defined Segment Duration
HF	The High Frequency (HF) as defined in the Variability Analysis Frequency Domain Frequency Bins over the user-defined Segment Duration
TP	The Total Power (TP) over the user-defined Segment Duration
Normalized LF	The normalized Low Frequency (LF) as defined in the Variability Analysis Frequency Domain Frequency Bins over the user-defined Segment Duration. This removes the VLF component.
Normalized HF	The normalized High Frequency (HF) as defined in the Variability Analysis Frequency Domain Frequency Bins over the user-defined Segment Duration.
LF/HF	The power ratio of low Frequency content divided by High frequency content over the user-defined Segment Duration.
Status	Provides an indication to the user should an issue be encountered with the analysis over the user-defined Segment Duration. See Variability Analysis \| Trouble Shooting section for more information.

Time Domain

Name	Definition
NNInterval	The average of all Normal-Normal (NN) interval in milliseconds over the user-defined Time Domain Reporting Period.
SDNN	The standard deviation of the averaged Normal-Normal (NN) intervals in milliseconds over the user-defined Time Domain Reporting Period.
RMSSD	The root mean square of successive differences in milliseconds. sqrt(1/N*Σ(NNn - NN(n-1))^2) Where N is the number of valid adjacent NN values that are not separated by data breaks or bad data marks.
NNx	The number of valid adjacent NN values that are not separated by data breaks or bad data marks that differ by more than x milliseconds. X is defined in the Time Domain pNNx -X Value setting.
pNNx	The proportion of valid adjacent NN values that are not separated by data breaks or bad data marks that differ by more than x milliseconds (NNx) divided by the total number of Normal-Normal intervals (Cycles).
Cycles	The number of available NN values.
Status	Provides an indication to the user should an issue be encountered with the analysis over the user-defined Segment Duration. See Variability Analysis \| Trouble Shooting section for more information.

This article was published directly from the manual of Ponemah 6.5; access the manual through the software by clicking Help > Contents.