Removal of respiratory artifacts from cardiogenic impedance signal by digital filtering

S. B. Raza, Robert P Patterson, Li Wang

Research output: Contribution to journalArticlepeer-review

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 languageEnglish (US)
Pages (from-to)634-635
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume11 pt 2
StatePublished - Dec 1 1989

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