Average (mean) duration of regular heartbeats in a sample of RR intervals.

Slope of the transfer function that characterises the short term fluctuation of regular heartbeats in a sample of RR intervals.

Peng, C. ‐K., Havlin, S., Stanley, H. E., & Goldberger, A. L. (1995). Quantification of scaling exponents and crossover phenomena in nonstationary heartbeat time series. Chaos: An Interdisciplinary Journal of Nonlinear Science, 5(1), 82–87. https://doi.org/10.1063/1.166141

Slope of the transfer function that characterises the long term fluctuation of regular heartbeats in a sample of RR intervals.

Peng, C. ‐K., Havlin, S., Stanley, H. E., & Goldberger, A. L. (1995). Quantification of scaling exponents and crossover phenomena in nonstationary heartbeat time series. Chaos: An Interdisciplinary Journal of Nonlinear Science, 5(1), 82–87. https://doi.org/10.1063/1.166141