Implantable cardiac stimulation device, system and method...

Surgery – Diagnostic testing – Cardiovascular

Reexamination Certificate

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Reexamination Certificate

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07613508

ABSTRACT:
An implantable cardiac system including an implantable cardiac stimulation device provides a heart activity signal of a heart facilitating measurement of slowly changing electrogram features. The system comprises at least one implantable electrode arrangement that senses cardiac electrical activity and provides an intracardiac electrogram signal, a first high pass filter that filters the electrogram and an equalizer that filters the filtered electrogram signal. The equalizer has a transfer function that is non-decreasing for frequencies up to a lower frequency breakpoint that is less than the upper frequency breakpoint, decreasing for frequencies between the lower frequency breakpoint and the upper frequency breakpoint, and generally flat for frequencies above the upper frequency breakpoint through a bandpass region of interest.

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Medtronic Reveal® Plus Insertable Loop Recorder Brochure; pp. 1-10; publication date unknown.
Medtronic Reveal® Plus Insertable Loop Recorder Implant & Programming Guide; pp. 1-35; publication date unknown.
NonFinal Office Action, mailed Mar. 24, 2003: Grandparent U.S. Appl. No. 09/963,207.
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NonFinal Office Action, mailed Apr. 19, 2006: Parent U.S. Appl. No. 10/723,027
Notice of Allowance, mailed Jun. 29, 2007: Parent U.S. Appl. No. 10/723,027.

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