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In addition to the feature based on the Gabor transform, the continuous two QRS waves of the RR period is another important feature, which describes the location of many heart pumping R waves in many cardiac the arrhythmias.
QRS wave representing ventricular depolarization by the ECG deflection.
The 12 lead ECG was taken in athletes on the fourth week during the same time of the day, and QRS wave amplitude was measured in them using Minnesota code of ECG classification.