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High-frequency components in ECG analysed in guinea-pig Langendorf preparations

Publiceringsår: 2001
Språk: Engelska
Sidor: 576-583
Publikation/Tidskrift/Serie: Clinical Physiology
Volym: 21
Nummer: 5
Dokumenttyp: Artikel
Förlag: Blackwell Science Ltd

Sammanfattning

High-frequency components in ECG during global ischaemia were studied in isolated guinea-pig hearts perfused ad modum Langendorf. Electrocardiograph recordings were carried out from the epicardial surface both in normo- and low-flow perfusion. After bandpass filtering (5-500 Hz), signal-averaging, was undertaken. The high-frequency components either increased or decreased after low-flow perfusion was instituted. Root-mean-square voltage (RMS) of the depolarization signal correlated poorly with the signal amplitude, but highly with the first and second derivative, i.e. the velocity and the acceleration of the signal. It is concluded that high-frequency components are not pathological phenomena per se, but reflect the shape of the original electrocardiographic signal.

Disputation

Nyckelord

  • Medicine and Health Sciences

Övriga

Published
Yes
  • ISSN: 0144-5979

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