Coherent signal rejection in ECG

Details Coherent signal rejection in ECG Coherent signal rejection in ECG

2011-02-22

2011-02-22

Layno, Carl H (Department: 3766)

Surgery

Diagnostic testing

Cardiovascular

C600S508000

Reexamination Certificate

active

07894885

ABSTRACT:
A method for monitoring an electrocardiogram (ECG) signal of a subject, includes digitally sampling an average signal from at least a first ECG electrode, determining an average interference frequency, and digitally sampling and buffering a raw ECG signal from at least a second ECG electrode. The method further includes: filtering the raw ECG signal to generate a residual signal; calculating, based on the residual signal, a first amplitude and a first phase shift of a primary interference signal at the average interference frequency and a second amplitude and a second phase shift of one or more harmonic interference signals at respective multiples of the average interference frequency; and digitally subtracting the primary interference signal and the one or more harmonic interference signals from the raw ECG signal so as to generate and output a clean ECG signal.

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