Abstract
The use of a digital high-pass filter designed and implemented on a personal computer for thoracic impedance cardiography (ZCG) is discussed. Two male subjects were tested under supine, sitting and 50-W exercise conditions. The first derivative of the thoracic impedance signal was recorded by a standard four-electrode impedance cardiograph. The digital high-pass filter automatically selects its cutoff frequency (CF) as a fraction of the heart rate. It was determined that a fractional value of 0.35 provides the best elimination of breathing artifacts with minimal effect on the cardiac signal.
Original language | English (US) |
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Pages (from-to) | 634-635 |
Number of pages | 2 |
Journal | Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings |
Volume | 11 pt 2 |
State | Published - Dec 1 1989 |