Detection of late potentials in patients with and without myocardial infarction. (III) Time versus frequency domain

DE Balderson, OJ Escalona, RH Mitchell, DWG Harron

Research output: Contribution to journalArticle

Abstract

The presence of late potentials has been positively linked to patients at risk of a sudden and possibly fatal arrhythmic event. Two methods have been investigated to identify late potentials, the Time and Frequency domain methods. This study investigated the presence of late potentials in three groups of subjects (healthy volunteers, and patients with and without myocardial infarction and/or cardiovascular disease) by the Time and Frequency domain methods. Within each method, several systems using different parameter values, filters, passbands and segment start and stop points were used. The study examined whether any association existed between the two methods for identifying late potentials, and whether the same subjects were identified by both methods. The results indicated that between 14.2% and 83.3% of subjects identified by the Time domain were also identified by the Frequency domain. The percentage identified by both was dependent on the parameter values, filters and passbands used within the Time domain and the segment position used, and percentage parameter values set for the Fast Fourier Transformation in the Frequency domain.
Original languageEnglish
Pages (from-to)3-11
JournalAutomedica
Volume16
Issue number1-2
Publication statusPublished - 15 Jan 1994

Keywords

  • Bandpass filters
  • Cardiovascular system
  • Electrocardiography
  • Electrophysiology
  • Fast Fourier transforms
  • Frequency domain analysis
  • Living systems studies
  • Parameter estimation
  • Patient monitoring
  • Time domain analysis
  • Fatal arrhythmic event
  • Late potentials
  • Myocardial infarction
  • Bioelectric potentials

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