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Slow trends in the RR interval (RRI) series should be removed in the preprocessing step to get a reliable result of heart rate variability (HRV) analysis. Re-sampling is required to convert the unevenly sampled RRI series into evenly sampled time series when using the widely accepted smoothness priors approach (SPA). Noise is introduced in this process and the information quality is thus compromised...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.