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Fast Fourier transform (FFT) analysis is a popular method of spectral analysis of atrial fibrillation cycle lengths (AFCL). Autocorrelation function (ACF) analysis is also available, so the aim of this study was to elucidate the relationship between FFT and ACF analyses in the spectral analysis of AFCLs.

circulation journal

Spectral Analysis of Atrial Fibrillation Cycle Lengths Comparison Between Fast Fourier Transform Analysis and Autocorrelation Function Analysis Using Multipurpose Physio-Informatic Analysis Software