0. Preprocessing of RR intervals (RRIntervalPreprocess.m)
This function preprocesses RR interval data in preparation for running HRV analyses.
Noise and non-normal beats are removed from the RR interval data and replaced with
interpolated data using a interpolation method of choice.
Output || ||
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NNinterp3 || interp1.m || After noise and non-normal beats
tinterp3 || interp1.m || are removed data are interpoleted
flagged_beats || || using "interp1.m" Matlab fucntion
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1. Time Domain Metrics ( EvalTimeDomainHRVstats)
HRV Metric || Function used || Note
|| for computation ||
==================================================================================
NNmean || mean.m || (Matlab function)
NNmedian || median.m || (Matlab function)
NNmode || mode.m || (Matlab function)
NNvariance || var.m || (Matlab function)
NNskew || skewness.m || (Matlab function)
NNkurt || kurtosis.m || (Matlab function)
NNiqr || iqr.m || (Matlab function)
SDNN || std.m || (Matlab function) -- Standard deviation of NN intervals
RMSSD || runrmssd.m || Adapted from Kaplan Tools -- Square root of the mean of the sum of the squares of the differences
pnn50 || pnna.m || Adapted from Kaplan Tools -- Finds the fraction of consecutive beats that differ by more 50 msec
btsdet || length.m || (Matlab function)
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2. Frequency Domain Metrics ( EvalFrequencyDomainHRVstats.m)
HRV Metric || Function used || Note
|| for computation ||
==================================================================================
ulf || CalcLfHfParams.m || need Power Spectral Density (PSD) as input, it is computed
vlf || CalcLfHfParams.m || using "pwelch.m" or "pburg.m "Matlab function *
lf || CalcLfHfParams.m ||
hf || CalcLfHfParams.m || or Lomb-Scargle normalized periodogram using
lfhf || CalcLfHfParams.m || provided CalcLomb.m function which is quivalent
ttlpwr || CalcLfHfParams.m || to Matlab plomb.m
||
|| or double sided spectrum using FFT
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4. Acceleration and Deceleration Metrics (prsa.m)
HRV Metric || Function used || Note
|| for computation ||
==================================================================================
ac_results || prsa.m || This function was originall written by
dc_results || prsa.m || L.Campana and G.D.Clifford modyfied by
A.Vest to be used in HRV toolbox
5. Calculates SDANN and SDNNindex (ClalcSDANN.m)
HRV Metric || Function used || Note
|| for computation ||
==================================================================================
SDANN || std.m || Standard deviation of the averages of values
SDNNI || mean.m || Mean of the standard deviations of all values