Title :
Removal of respiratory artifacts from cardiogenic impedance signal by digital filtering
Author :
Raza, S.B. ; Patterson, R.P. ; Wang, Li
Author_Institution :
Dept. of Phys. Med. & Rehabilitation, Minnesota Univ. Hospital, Minneapolis, MN, USA
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
Keywords :
bioelectric phenomena; cardiology; computerised signal processing; digital filters; medical computing; microcomputer applications; 4-electrode impedance cardiograph; 50 W; cardiogenic impedance signal; cutoff frequency; digital filtering; digital high-pass filter; exercise; heart rate; male subjects; personal computer; respiratory artifacts removal; sitting; supine position; thoracic impedance cardiography; Cardiography; Cardiology; Cutoff frequency; Digital filters; Electrocardiography; Filtering; Heart; Hospitals; Impedance; Signal analysis;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95909
