I. Dotsinsky

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THE FILTERING of power-line interference from the electrocardiogram (ECG) is a very important procedure in any modem electrocardiograph. The requirements for this type of procedure are generally well known and have been very well formulated by Cramer et al. (eRASER et al. , 1987). Despite the high common mode rejection ratio of the input amplifiers of the(More)
THE AUTOMATIC or visual measurement and interpretation of the electrocardiogram depends strongly on the quality of the memorised or recorded signals. The absence of mains interference and baseline drift are the two main conditions for a high-quality signal. The 50 Hz interference has been successfully eliminated by an adaptive subtraction procedure (LEvKOV(More)
1 In t roduct ion DIGITAL FILTERING of the electrocardiogram (ECG) is a successful way of suppressing mains interference, but it affects some of the frequency components of the signal, an artefact which would not be acceptable in some cases of automatic ECG processing. Some methods have therefore been developed involving subtraction of the interference from(More)
DC AMPLIFICATION of bioelectrical signals has many well known advantages over AC amplification, including a fast response and recovery after large transient artefacts and a reduced number of components leading to compact design. However, the need for high gain combined with undesirable but large and relatively unstable electrode polarisation voltages makes(More)
The electrocardiograph has eight input channels and the signals are multiplexed, digitised and stored using a microprocessor system, The 12 routine leads data are the computed and plotted by a fast microdot thermal printer/plotter. Digital filtering for EMG signals can be used and an extremely effective 50 Hz interference elimination digital filter is(More)
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