NDLI: ECG-based detection of body position changes in ischemia monitoring

Content Provider	IEEE Xplore Digital Library
Author	Garcia, J. Astrom, M. Mendive, J. Laguna, P. Sornmo, L.
Copyright Year	1964
Abstract	The purpose of this paper is to analyze and detect changes in body position (BPC) during electrocardiogram (ECG) recording. These changes are often manifested as shifts in the electrical axis and may be misclassified as ischemic changes during ambulatory monitoring. We investigate two ECG signal processing methods for detecting BPCs. Different schemes for feature extraction are used (spatial and scalar), while preprocessing, trend postprocessing and detection are identical. The spatial approach is based on VCG loop rotation angles and the scalar approach is based on the Karhunen-Loeve transform (KLT) coefficients. The methods are evaluated on two different databases: a database with annotated BPCs and the STAFF III database with recordings from rest and during angioplasty-induced ischemia but not including BPCs. The angle-based detector results in performance values of detection probability P/sub D/=95%, false alarm probability P/sub F/=3% in the BPC database and false alarm rate in the STAFF III database in control ECGs during rest R/sub F/(c)=2 h/sup -1/ (episodes per hour) and in ischemia recordings during angioplasty R/sub F/(a)=7 h/sup -1/, whereas the KLT-based detector produces values of P/sub D/=89%, P/sub F/=3%, R/sub F/(c)=4 h/sup -1/, and R/sub F/(a)=11 h/sup -1/, respectively. Including information on noise level in the detection process to reduce the number of false alarms, performance values of P/sub D//spl sime/90%, P/sub F//spl sime/1%, R/sub F/(c)/spl sime/1 h/sup -1/ and R/sub F/(a)/spl sime/2 h/sup -1/ are obtained with both methods. It is concluded that reliable detection of BPCs may be achieved using the ECG signal and should work in parallel to ischemia detectors.
Sponsorship	IEEE Engineering in Medicine and Biology Society
Page Count	9
File Size	515246
Starting Page	677
Ending Page	685
File Format	PDF
ISSN	00189294
Volume Number	50
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ischemic pain Monitoring Electrocardiography Spatial databases Karhunen-Loeve transforms Angioplasty Detectors Signal processing Feature extraction Noise level
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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