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HRV_rates - Coggle Diagram

- - - - measured in the unit of milliseconds (ms), is the standard deviation of the
        normal beat intervals (denoted NN intervals)
      - the accuracy of SDNN is higher for longer recording periods, especially over 24 h periods
    - - the standard deviation of average NN is extracted for each 5 min segment of the long-term HR time series
      - estimate of long-term components contributing
        to HRV
    - - is the mean of the standard deviations of NN calculated
        per 5 min segment
      - I assesses the variability within the short intervals and hence is an estimate
        of short-term components that modulate HR signals
    - - Some of them involve certain forms of normalization, such as the Coefficient of Variation of NN (CV), i.e., the ratio of the standard deviation to the mean, which could be more stable when comparing individuals or conditions with different HR baselines [45]. Others involve “robust” alternatives to traditional dispersion indices, such as the Median Absolute Deviation (MAD; a medianbased index of variability) or the interquartile range (IQR), that are less influenced by outliers and, thus, less sensitive to measurement errors