Spectral analysis of high resolution ECG in study on late potentials

Spectral analysis of high-resolution ECG based on fast Fourier transform and autoregressive estimation is discussed. The detectability of cardiac late potentials and prediction of ventricular tachyarrhythmias are compared using time and frequency analysis of ECG data of 120 patients after myocardial infarction. The quantification of spectrotemporal maps was proposed to simplify interpretation of results and to obtain numerical criteria for risk stratification of ventricular arrhythmias.