System and method for analyzing selected signal components in electrocardiographic signals, particularly late potentials in electrocardiograms

A method for analyzing selected signal components in physiological measurement signals, comprising the steps of:

• selecting a portion of a physiological measurement signal to be analyzed;
• selecting a plurality of substantially overlapping mutually offset time segments of said portion;
• deriving a plurality of low order frequency functions representing the low-band spectral components in each respective time segment;
• deriving a plurality of high order frequency functions representing the broadband spectral components in each respective time segment;
• deriving a plurality of difference frequency functions by subtracting said low order frequency functions from respective high order frequency functions;
• and
• comparing said difference frequency functions, the comparison indicating detailed analysis of selected signal components in physiological measurement signals.

A system for analyzing selected signal components in physiological measurement signals, comprising:

• means for selecting a portion of a physiological measurement signal to be analyzed;
• means for selecting a plurality of substantially overlapping mutually offset time segments of said portion;
• means for deriving a plurality of low order frequency functions representing the low-band spectral components in each respective time segment;
• means for deriving a plurality of high order frequency functions representing the broadband spectral components in each respective time segment;
• means for deriving a plurality of difference frequency functions by subtracting said low order frequency functions from respective high order frequency functions;
• means for comparing said difference frequency functions, the comparison indicating detailed analysis of selected signal components in physiological measurement signals;
• and
• means for outputting a three-dimensional plot of said frequency functions indicating detailed analysis of selected signal components in physiological measurement signals.