In this paper, the application of FFT to spectral analysis of ECG (radix
2 FFT, mixed radix FFT and the use of FFT to the signals without 2 to the
integer specimen points was briefly discussed.
The mathematical model of ECG composed of triangular and domelike
waves and the calculative method of theoretical spectrum of ECG were prese-
nted. The theoretical spectrum was compared with the real spectrum of ECG
calculated by means of FFT i...