Selective Filter for Electrocardiograph
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09
This method proposes a means to detect and correct muscle tremor without distorting the electrocardiogram (ECG) signal. It proposes a non- linear filter designed to take advantage of the characteristics of an ECG. In the operation of ECGs the frequency spectra of the signal and noise have a large overlap. This is generally limited to specific events in the time domain manifestation of the signal. These include QRS complexes and sharp P and T waves. When a filter is designed to remove the effects of muscle tremors in the ECG, the objective is to avoid filtering the foregoing effects or to at least minimize filtering them. Generally the remainder of the ECG, the baseline, may be safely filtered since the signal-noise spectral overlap is almost zero in this area.