Detail publikace

Time-Frequency Analysis of Electrocardiograms

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

Originální název

Time-Frequency Analysis of Electrocardiograms

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Rok RIV

2003

Vydáno

1. 4. 2003

ISSN

0301-5491

Periodikum

Lékař a technika

Ročník

34

Číslo

2

Stát

Česká republika

Strany od

60

Strany do

67

Strany počet

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"
}