Patent ID: 6532382
Filing Date: 2003-03-11
Classification: A61B,A61N

Abstract:
A method of calculating the heart rate variability of the human heart to be used in an ECG monitor, said method comprising the steps of:scanning an ECG signal received from the ECG monitor during a scanning interval, determining from the scanned ECG signals a number of discrete measuring values representative of the heart rate variability, and evaluating these discrete measuring values on the basis of a Fourier transformation, wherein a frequency spectrum of the measuring values is calculated from Fourier coefficients of the Fourier transformation, which are calculated from a combination of said measuring values with sinus- and cosinus-shaped Fourier vectors of the Fourier transformation wherein the Fourier vectors involved in the calculation are a number of discrete real numerical vector values, and replacing the numerical vector values for calculating the frequency spectrum of the scanned measuring values by rough, integral approximate vector values of a limited number which roughly reproduce the Fourier vectors.