心房細動ｆ波の周波数解析とｆ波認識への応用

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  • Frequency Spectral Analysis of ECG f-wave and Its Application to the f-wave Recognition
  • シンボウ サイドウ fハ ノ シュウハスウ カイセキ ト fハ ニンシキ エ

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This paper describes fnequency spectnal analysis of ECG f-wave and its application to the f-wave recognition in a computer diagnostic system (Nihon Kohden DCC-3300, CPU NOVA-01). Short interval signal of V1 chest-lead in the standard 12 leads transmitted through telephone line was mainly analyzed by means of Fast Fourier Transform.<BR>Fnequency spectrum of f-wave showed a peak modulus (f-peak) of more than 0.01±0.005mV in the range of 5-8Hz, the features of which were quite different from those without f-wave. It therefore follows that high accuracy recognition of f-wave would be possible by setting a frequency window in the range of 4.5-8.5 Hz and the threshold discriminating f-peak modulus. Particularly for the data composed of multiple f-wave segments, thershold of 0.006 mV has made possible the recognition of f-wave and classification of atrial fibrillation with more than 90% correctness.<BR>Although recognition of f-wave within associated noise and other background signals is difficult, our proposed method should be useful for the recognition of f-wave accompanied with atrial fibrillation in a telephone-transmitted ECG diagnostic system.

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