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

OJ Escalona, RH Mitchell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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, (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
Original languageEnglish
Title of host publicationUnknown Host Publication
Place of Publication345 E 47TH ST, NEW YORK, NY 10017
PublisherIEEE
Pages1272-1273
Number of pages2
Volume16
ISBN (Print)0-7803-2050-6
DOIs
Publication statusPublished - 1994
Event16TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY - ENGINEERING ADVANCES: NEW OPPORTUNITIES FOR BIOMEDICAL ENGINEERS - Baltimore, MD, USA.
Duration: 1 Jan 1994 → …

Conference

Conference16TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY - ENGINEERING ADVANCES: NEW OPPORTUNITIES FOR BIOMEDICAL ENGINEERS
Period1/01/94 → …

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.

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  • Cite this

    Escalona, OJ., & Mitchell, RH. (1994). Use of the Hartley transform for vector spectral combination of orthogonal leads in late potential analysis. In Unknown Host Publication (Vol. 16, pp. 1272-1273). 345 E 47TH ST, NEW YORK, NY 10017: IEEE. https://doi.org/10.1109/IEMBS.1994.415428