NDLI: Use of the Hartley transform for vector spectral combination of orthogonal leads in late potential analysis

Content Provider	IEEE Xplore Digital Library
Author	Escalona, O.J. Mitchell, R.H.
Copyright Year	1994
Description	Author affiliation: Northern Ireland Bio-Eng. Centre, Ulster Univ., UK (Escalona, O.J.)
Abstract	Frequency-domain analysis of ventricular late potentials in the three orthogonal leads XYZ can reveal features of clinical significance. However, a consistent and simple method of spectral analysis has not been agreed. For a more easy interpretation of the spectral information in the 3 orthogonal leads a novel method of vector spectral analysis of ventricular late potentials is proposed here. The method exploits the property of zero-phase normalisation in the N amplitude coefficients (real-valued) of the Discrete Hartley Transform (DHT). This property of the DHT allows an advantageous way of combining the three orthogonal spectra, SX, SY and SZ, into a vector magnitude spectrum, (SX/sup 2/+SY/sup 2/+SZ/sup 3/)/sup 1/2 /. Summation of amplitude coefficients in the -300 to -60 Hz and 60 to 300 Hz frequency ranges in the DHT vector spectrum provided a simple clinical parameter, S. A clinical evaluation of S indicated that S is of significantly greater value (10.4/spl plusmn/5.8 /spl mu/V) in post-MI patients which are VT inducibles (at risk) than in healthy subjects (3.2/spl plusmn/2.4 /spl mu/V), p<0.001.
Starting Page	1272
Ending Page	1273
File Size	220983
Page Count	2
File Format	PDF
ISBN	0780320506
DOI	10.1109/IEMBS.1994.415428
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-11-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency domain analysis Discrete transforms Spectral analysis Myocardium Content addressable storage Sampling methods Delay Fast Fourier transforms Signal analysis Time domain analysis
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
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
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