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Cardiac pacer employing discrete frequency changes

  • US 4,095,603 A
  • Filed: 12/17/1976
  • Issued: 06/20/1978
  • Est. Priority Date: 12/17/1976
  • Status: Expired due to Term
First Claim
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1. A fully implantable cardiac pacer comprisinga cardiac stimulation generator capable of producing stimulation pulses at at least two controlled and well-defined frequencies, said generator including at least one component having an operating condition which can change,monitor circuitry responsive to the condition of at least one said component of said pacer to provide an output signal indicative of said condition, said output signal characterized by having a plurality of defined states, andsaid generator havingclock means for generating primary clock pulses at a frequency higher than the frequency of said stimulation pulses, andfrequency changing means responsive to said monitor output signal and said primary clock pulses for generating said stimulation pulses at one of said well-defined frequencies depending upon the state of said output signal.

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