NDLI: Adaptive filtering for suppression of respiratory artifact in impedance cardiography

Content Provider	IEEE Xplore Digital Library
Author	Pandey, V.K. Pandey, P.C. Burkule, N.J. Subramanyan, L.R.
Copyright Year	2011
Description	Author affiliation: Department of Electrical Engineering, Indian Institute of Technology Bombay, India (Subramanyan, L.R.) \|\| Indian Institute of Technology Bombay (Pandey, V.K.) \|\| Department of Electrical Engineering, Indian Institute of Technology Bombay, Powai Mumbai 400 076, Maharashtra, India (Pandey, P.C.) \|\| Asian Heart Institute and Research Center, Mumbai (Burkule, N.J.)
Abstract	Impedance cardiography is a noninvasive technique, based on sensing the variation in the electrical impedance of the thorax caused by variation in the blood volume during the cardiac cycle, for monitoring the stroke volume and some other cardiovascular indices. Respiratory and motion artifacts cause baseline drift in the sensed impedance waveform, particularly during or after exercise. This paper presents an LMS-based adaptive filtering technique for suppression of respiratory artifact for improving the estimation of the indices without smearing the beat-to-beat variations. It uses a reference signal, closely related to the respiratory artifact, obtained by a least-squares approximation based B-spline fitting on the contaminated impedance cardiogram in synchronism with the respiratory phases. The technique is evaluated on signals with simulated artifacts and on signals from nine healthy subjects and five patients with cardiovascular disorders. The values of the stroke volume, estimated on beat-to-beat basis, after suppression of respiratory artifact showed a good agreement with those from Doppler echocardiography.
Starting Page	7932
Ending Page	7936
File Size	449812
Page Count	5
File Format	PDF
ISBN	9781424441211
ISSN	1557170X
e-ISBN	9781457715891
e-ISBN	9781424441228
DOI	10.1109/IEMBS.2011.6091956
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Impedance Doppler effect Echocardiography Estimation Electrocardiography Delay
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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