Publication detail

Time-Frequency Analysis of Electrocardiograms

PROVAZNÍK, I. KOZUMPLÍK, J. KOLÁŘOVÁ, J. NOVÁKOVÁ, Z. NOVÁKOVÁ, M.

Original Title

Time-Frequency Analysis of Electrocardiograms

Type

journal article - other

Language

English

Original Abstract

The paper deals with time-frequency analysis of ECG signals using wavelet transform (WT). WT is applied to detect electrophysiological changes in ischemic heart. Reasons of WT implementation are justified. WT is defined and possibilities of its representation are shown. An algorithm for detection of ECG signal components using a contour envelope is designed in the experimental part of the paper. Properties of WT are further documented on a method of detection of electrophysiological changes in ischemic heart. Electrical activity of isolated hearts (n=11) in Langendorff experiment was recorded during induced acute ischemia. Recordings were analysed using measurement of shifts in phase time-frequency spectra. The results show that myocardial ischemia can be reliably detected within one minute after coronary artery occlusion under experimental conditions.

Keywords

wavelet transform, time-frequency analysis, signal detection, ECG signal, isolated heart, myocardial ischemia

Authors

PROVAZNÍK, I.; KOZUMPLÍK, J.; KOLÁŘOVÁ, J.; NOVÁKOVÁ, Z.; NOVÁKOVÁ, M.

RIV year

2003

Released

1. 4. 2003

ISBN

0301-5491

Periodical

Lékař a technika

Year of study

34

Number

2

State

Czech Republic

Pages from

60

Pages to

67

Pages count

8

BibTex

@article{BUT41125,
  author="Valentine {Provazník} and Jiří {Kozumplík} and Jana {Kolářová} and Zuzana {Nováková} and Marie {Nováková}",
  title="Time-Frequency Analysis of Electrocardiograms",
  journal="Lékař a technika",
  year="2003",
  volume="34",
  number="2",
  pages="8",
  issn="0301-5491"
}