Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2006-08-08
2006-08-08
Pezzuto, Robert E. (Department: 3766)
Surgery
Diagnostic testing
Cardiovascular
C607S014000, C607S025000
Reexamination Certificate
active
07089049
ABSTRACT:
A medical device is directed to techniques for removing polarization artifacts from electrical activity signals in order to detect presence of an evoked response. More specifically, a medical device receives a signal that represents electrical activity within a heart of a patient following delivery of a stimulation pulse to the heart and reconfigures a filter state of a filter from an initial filter state to remove the polarization artifact from the electrical activity signal in order to determine whether a cardiac event, such as an evoked response has occurred. The medical device may, for example, when the filter of the medical device is a digital filter, recalculate the values of digital filter components using the present input value of the electrical activity signal as a direct current (DC) input value of the digital filter.
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Kerver Harry Bernardus Antonius
Oosterhoff Peter
Chapik Daniel G.
Heller Tammie K.
Medtronic Inc.
Pezzuto Robert E.
Wolde-Michael Girma
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