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Automatic capture detection during non-invasive programmed stimulation of a patient's heart

  • US 5,925,067 A
  • Filed: 12/11/1997
  • Issued: 07/20/1999
  • Est. Priority Date: 12/11/1997
  • Status: Expired due to Term
First Claim
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1. A cardiac non-invasive programmed stimulation system for performing an electrophysiological test on a patient comprising:

  • a. an implantable device having(i) a sense circuit for sensing electrical activity in said patient'"'"'s heart, said sense circuit generating a corresponding sense signal;

    (ii) a pace generator for generating pulses for the heart in response to commands;

    (iii) a controller for receiving said sense signals and for generating said commands in accordance with a program defined by programming information; and

    (iv) an implant transceiver for receiving said programming information for said controller;

    B. An external programmer having(i) an input device for receiving instructions;

    (ii) a controller for receiving said instructions and generating said programming information, said programming information defining for said implantable device a test mode of operation;

    C. a test pulse generator for selectively generating test pulses for said heart while said implantable device is in said test mode, including a first set of test pulses and a second set of test pulses; and

    ;

    D. a capture detector for automatically detecting when said test pulses of said second set of test pulses capture said heartwherein said test pulse generator is coupled to said capture detector to adjust a characteristic of said second pulses when said capture detector does not detect capture by said second set of test pulses.

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