NDLI: Vectorcardiographic representation of concordant and discordant T-Wave alternans

Content Provider	IEEE Xplore Digital Library
Author	Janusek, D. Pawlowski, Z. Kania, M. Karczmarewicz, S. Przybylski, A. Maniewski, R.
Copyright Year	2009
Description	Author affiliation: Department of Cardiology, Postgraduate Medical School, Grochowski Hospital, Warsaw, Poland (Karczmarewicz, S.) \|\| Institute of Radioelectronics, Warsaw University of Technology, Poland (Pawlowski, Z.) \|\| Institute of Biocybernetics and Biomedical Engineering PAS, Warsaw, Poland (Janusek, D.; Kania, M.; Maniewski, R.) \|\| Institute of Cardiology, Warsaw, Poland (Przybylski, A.)
Abstract	Vectorcardiographic representation of T-wave alternans (TWA) has been presented in new coordinate system created by means of singular value decomposition where the first axis was in T-loop direction and other axes were perpendicular. Projection of T-loop vector on the plane perpendicular to the first axis was analyzed. The study shows that in case of healthy people and those with detectable TWA, in whom no ventricular events were occurred, shape of consecutive T-loops does not change significantly from beat to beat. Detected TWA is supposed to be concordant, which is relatively benign. In electrocardiograms of patients who had ventricular tachycardia or ventricular fibrillation events, the shape of T-loops changes from beat to beat. It is supposed to be discordant TWA. It was showed that T-loop shape analysis can serve as noninvasive tool for differentiation between concordant TWA and discordant one what can help in better identification of patients at risk of sudden cardiac death.
Starting Page	705
Ending Page	708
File Size	435529
Page Count	4
File Format	PDF
ISBN	9781424472819
ISSN	02766547
e-ISBN	9781424472826
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Computers in Cardiology(CinC)
Subject Keyword	Cardiology Fibrillation Shape Electrocardiography Singular value decomposition Event detection Cybernetics Biomedical engineering Educational technology Hospitals
Content Type	Text
Resource Type	Article

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