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Implantable cardiac stimulation device having an improved backup mode of operation and method thereof

  • US 5,653,735 A
  • Filed: 06/28/1995
  • Issued: 08/05/1997
  • Est. Priority Date: 06/28/1995
  • Status: Expired due to Term
First Claim
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1. An implantable cardiac stimulation device, comprising:

  • sensing means for sensing a physiological parameter of a patient;

    pulse generating means for providing stimulation pulses to the patient'"'"'s heart;

    control means, coupled to the pulse generating means and responsive to the sensing means, for controlling at least one of amplitude and timing of the stimulation pulses;

    means, coupled to the control means, for storing two alternative sets of instructions that, when executed, determine operation of the control means, the two alternative sets of instructions each provide a normal mode of operation; and

    error detection means for detecting errors in the operation of the implantable cardiac stimulation device;

    wherein the control means includes;

    means for operating in a first mode of operation using a first set of instructions, andmeans for switching to a second mode of operation using the alternative set of instructions in the event that an error is detected in the first mode of operation.

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