Method and apparatus for identifying cardiac and non-cardiac oversensing using intracardiac electrograms
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United States of America Patent
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Aug 24, 2010
Grant Date -
Jan 22, 2004
app pub date -
Apr 18, 2003
filing date -
Apr 29, 2002
priority date (Note) -
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Abstract
A method and apparatus for automatically identifying various types of cardiac and non-cardiac oversensing and automatically performing a corrective action to reduce the likelihood of oversensing is provided. EGM data, including time intervals between sensed and paced events and signal morphologies, are analyzed for patterns indicative of various types of oversensing, including oversensing of far-field R-waves, R-waves, T-waves, or noise associated with electromagnetic interference, non-cardiac myopotentials, a lead fracture, or a poor lead connection. Identification of oversensing and its suspected cause are reported so that corrective action may be taken. The corrective action may include, for example, adjusting sensing parameters such as blanking periods, decay constants, decay delays, threshold values, sensitivity values, electrode configurations and the like.
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