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System for maintaining capture in an implantable pulse generator

  • US 5,417,718 A
  • Filed: 05/09/1994
  • Issued: 05/23/1995
  • Est. Priority Date: 11/23/1992
  • Status: Expired due to Term
First Claim
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1. A system for maintaining capture in an implantable pulse generator, the implantable pulse generator including means for delivering stimulation pulses to a heart, the delivering means including a tip, a ring and a case electrode in contact with body tissue, wherein the system further includes:

  • means for programmably altering an electrode configuration for delivery of stimulation pulses and for sensing cardiac signals, the electrode configuration being selected from one of tip-and-case, tip-and-ring or ring-and-case;

    means for generating stimulation pulses at a desired stimulation pulse energy using each of the electrode configurations;

    means for determining the optimum sensitivity for each of the electrode configurations at the desired stimulation pulse energy;

    processing means for comparing the optimum sensitivity for each of the electrode configurations, and for selecting as the optimum electrode configuration the electrode configuration corresponding to a prescribed difference signal; and

    programming means for automatically programming the pacemaker'"'"'s electrode configuration to the optimum electrode configuration selected by the processing means.

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