A signal evaluation method for detecting QRS complexes in electrocardiogram (ECG)
signals comprises the following steps:
- sampling of the ECG signal (4) and conversion into discrete signal
values (x(n)) in chronological order;
- comparing the signal values (xf(n), xfq(n)) to
a threshold function (K(n)) adaptively determined therefrom;
- determining a frequency number (D(n)) within a defined segment of the
consecutive signal values, by which signal values (xf(n), xfq(n))
preferably fall short of the threshold function (K(n));
- comparing the determined frequency number (D(n)) to a defined threshold
(), wherein an undershoot of the threshold () is significant for
apresence of a QRS complex (5, 6, 7) in the defined segment of the ECG signal (4).
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