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

Escalona, OJ and Mitchell, RH (1994) Use of the Hartley transform for vector spectral combination of orthogonal leads in late potential analysis. In: 16TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY - ENGINEERING ADVANCES: NEW OPPORTUNITIES FOR BIOMEDICAL ENGINEERS, Baltimore, MD, USA.. Institute of Electrical and Electronics Engineers (IEEE). Vol 16 (2) 2 pp. [Conference contribution]

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DOI: 10.1109/IEMBS.1994.415428


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, (SX2+SY2+SZ3)½. 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±5.8 μV) in post-MI patients which are VT inducibles (at risk) than in healthy subjects (3.2±2.4 μV), p<0.001.

Item Type:Conference contribution (Paper)
Keywords:amplitude coefficients summation; clinically significant features; discrete Hartley transform; late potential analysis; orthogonal leads; orthogonal spectra; simple clinical parameter; vector spectral combination; zero-phase normalisation; Frequency domain analysis; Myocardial infraction; Signal averaging; Vector spectral combination.
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:6090
Deposited By: Professor Omar Escalona
Deposited On:08 Feb 2016 14:19
Last Modified:08 Feb 2016 14:19

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