Fig. 10From: A novel method for the detection of R-peaks in ECG based on K-Nearest Neighbors and Particle Swarm OptimizationResult after performing each stage of the method for the ECG with sudden changes of QRS complex waveforms and serious baseline wander (ECG recording 103). a) Original signal. b) Filtering. c) Differentiation. d) Absolute value. e) Backward cumulation. f) Detected peaksBack to article page