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Cardiac rhythm management systems and methods for detecting or validating cardiac beats in the presence of noise

  • US 7,215,993 B2
  • Filed: 08/06/2002
  • Issued: 05/08/2007
  • Est. Priority Date: 08/06/2002
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a cardiac signal detector, comprising a detector input configured to be coupled to a first electrode associated with a heart, and comprising a detector output providing a sampled cardiac signal; and

    a signal processor circuit, coupled to the detector output, the signal processor circuit configured to distinguish, using a peak sample, a preceding sample to the peak sample, and a subsequent sample to the peak sample, a cardiac depolarization from noise, and in which the signal processor circuit is configured to form an average statistic computed using as data points an amplitude of the peak sample from a baseline, an amplitude of the preceding sample from the same baseline, and an amplitude of the subsequent sample from the same baseline, and to distinguish between a cardiac depolarization and noise by comparing the statistic to a predetermined threshold value.

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