8.4. Extraction of RR Intervals

8.4.1. R-Peak Detection Method #

A function is used that:

• Applies preliminary filtering of the ECG signal
• Uses an adaptive threshold for peak detection
• Computes RR intervals:
  RR(i) = time(R_peak(i+1)) – time(R_peak(i))
• Filters artifacts (extrasystoles, missed beats)

8.4.2. Pulse Visualization #

The upper graph shows:

• Gray points: all detected pulses
• Blue points: valid RR intervals
• Red points: extrasystoles (marked for exclusion)