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Cardiac stimulator with data converter for cardiac signal

  • US 5,354,315 A
  • Filed: 06/04/1993
  • Issued: 10/11/1994
  • Est. Priority Date: 06/04/1993
  • Status: Expired due to Term
First Claim
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1. An implantable cardiac stimulator comprising:

  • means for stimulating the heart;

    means for sensing intrinsic cardiac waveforms in the heart;

    means for converting said intrinsic cardiac waveforms from analog to digital form, said converting means consisting oftiming means for defining measurement cycles;

    sampling means for sampling the analog value of said cardiac waveform in a measurement cycle;

    means for comparing at least two sampled analog values of said cardiac waveforms;

    means for determining an analog difference having a predicted probability of occurrence between said two sampled cardiac waveforms;

    means for assigning a digital code to said analog difference, said digital code being of predetermined, variable size, said size being proportional to the predicted probability of occurrence of said difference.

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