NDLI: Coherent ensemble averaging techniques for impedance cardiography

Content Provider	IEEE Xplore Digital Library
Author	Hurwitz, B.E. Shyu, L.-Y. Reddy, S.P. Schneiderman, N. Nagel, J.H.
Copyright Year	1990
Description	Author affiliation: Miami Univ., Coral Gables, FL, USA (Hurwitz, B.E.; Shyu, L.-Y.; Reddy, S.P.; Schneiderman, N.; Nagel, J.H.)
Abstract	Ensemble averaging provides some improvement in the stability of the signal and signal-to-noise noise ratio under conditions of nonperiodic influences of respiration and motion. Coherent averaging techniques were developed to determine whether further enhancement of the impedance cardiogram could be obtained. Physiological signals were obtained from 16 male and female subjects during resting conditions, while delivering a speech, and while undergoing submaximal bicycle exercise. Results indicated that improved resolution of dZ/dt signal events could be obtained using coherent ensemble averaging. Although some improvement in precision of event location was obtained, most enhancement of the impedance cardiogram occurred in measurement of the amplitude of the dZ/dt maximum (ejection velocity) during speaking and exercise conditions. Validated increases in dZ/dt maximum exceeding 20% were obtained in some subjects with coherent averaging, suggesting that the diagnostic utility of impedance cardiography can be improved using this technique.<>
Starting Page	228
Ending Page	235
File Size	540929
Page Count	8
File Format	PDF
ISBN	0818690402
DOI	10.1109/CBMSYS.1990.109403
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-06-03
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Impedance Cardiography Cardiology Delay Signal to noise ratio Bicycles Time measurement Medical diagnostic imaging Psychology Biomedical engineering
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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