The present invention relates to a method of signal processing of
electrograms for use in medical devices, preferably by time-frequency
transforms. The present invention additionally relates to a system for
receiving and analyzing such signals. The present invention preferably is
a method utilizing the time-frequency transforms, such as wavelet
transforms, for the purpose of artifact removal from EGs. These
transforms decompose a signal in both time and frequency domains, and
therefore, are well suited for non-stationary signal analysis. As a
result, dissimilar signal features are well localized both in time and
frequency, which potentially provides a good separation between the
signal of interest and artifacts. This particularly applies to
large-amplitude artifacts corrupting EGs.