Heart Rate Variability calculation methods

We present a gathering of information what is heart rate variability, it’s uses and interpretation. We also make an overview of the methods in time and frequency domain and also the nonlinear method for calculation of heart rate variability. The experiments compare different implementations of those methods in separate platforms – Matlab and the widely used, among medical experts and specialist, software platform Kubios. The results in the time domain prove to be almost identical, the frequency domain show similar trends even if the absolute values are not identical, and the results in the nonlinear calculations are similar.