Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2004-04-08
2009-06-30
Layno, Carl H (Department: 3766)
Surgery
Diagnostic testing
Cardiovascular
Reexamination Certificate
active
07555335
ABSTRACT:
Cardiac methods and devices that separate signals using at least two composite signals acquired at least at two input impedances. A target source impedance may be selected, and a cardiac signal may be separated from composite signals using the selected target source impedance. Medical systems include a cardiac device having a housing that provides amplification circuitry configured to have a first amplifier input impedance and a second amplifier input impedance, such as using two separate circuits or switching between two input impedances. One or more electrode assemblies are coupled to the amplification circuitry. A signal processor is provided in the housing configured to separate a source signal using a first composite signal detected at the first input impedance and a second composite signal detected at the second input impedance. The phase response of the first input amplifier circuit is about equal to that of the second input amplifier circuit.
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Brockway Marina
Haefner Paul
Kamath Apurv
Wagner Darrell Orvin
Bertram Eric D
Cardiac Pacemakers Inc.
Hollingsworth & Funk LLC
Layno Carl H
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