Method and apparatus for characterizing cardiac tissue from local electrograms
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United States of America Patent
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Apr 20, 2004
Grant Date -
Oct 17, 2002
app pub date -
Aug 22, 2001
filing date -
Sep 22, 2000
priority date (Note) -
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Abstract
The property of cardiac tissue at a local site, a plurality of sites of in a region of a heart may be characterized based on local electrograms measured at the local site, at a plurality of sites or in the region, respectively. The property may be characterized by normalizing the local electrogram, extracting a feature vector from the normalized electrogram, and classifying the tissue property based on the feature vector. The method of may further include computing a map of the tissue property and treating the tissue based on the resultant map. Apparatus to characterize the property includes a catheter and a processor to normalize the local electrogram, extract the feature vector from the electrogram and classify the tissue based on the feature vector.
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