Image Processing Reference
In-Depth Information
Fig. 19. Filtered ECG Signal Using Low-Pass 48 Hz Lynn's Filter
Fig. 20. Filtered ECG Signal Using High-Pass 0.2 Hz Lynn's Filter
Fig. 21. Filtered ECG Signal Using High-Pass 0.5 Hz Lynn's Filter
The filters application allows improving the ECG signal quality in a remarkable manner.
Figure 22 shows the application of a low-pass Lynn's filter of 48 Hz and a high-pass Lynn's
filter of 0.5 Hz.
Fig. 22. Filtered ECG Signal Using a Low-Pass 48 Hz Lynn's Filter and a High-Pass 0.5 Hz
Lynn's Filter
4.2 QRS detection algorithm on ECG signal
Within the automatic detection waveform of the ECG signal, it is important to detect QRS
complex (Cuesta, 2001; Vidal & Pavesi, 2004). This is the dominant feature of the ECG
signal. The QRS complex marks the beginning of the contraction of the left ventricle, so the
detection of this event has many clinical applications (Vidal et al., 2008; Townsend, 2001).