Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2006-12-26
2006-12-26
Pezzuto, Robert E. (Department: 3766)
Surgery
Diagnostic testing
Cardiovascular
C600S508000, C128S901000
Reexamination Certificate
active
07155275
ABSTRACT:
An implantable cardiac rhythm management (CRM) device includes a sensing and detection circuit that senses at least one cardiac signal and detects cardiac electrical events from the sensed cardiac signal using a detection threshold that is adjusted based on a dynamic noise estimation. The sensed cardiac signal is filtered to produce a filtered cardiac signal having a signal frequency band and a noise signal having a noise frequency band. The noise frequency band is substantially different from the signal frequency band. A dynamic noise floor is produced based on the noise signal and used as the minimum value for the detection threshold. A cardiac electrical is detected when the amplitude of the filtered cardiac signal exceeds the detection threshold.
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Balczewski Ron A.
Linder William J.
Maniak Jeremy
Cardiac Pacemakers Inc.
Lee Yun Haeng
Pezzuto Robert E.
Schwegman Lundberg Woessner & Kluth P.A.
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