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Cardiac pacemaker with triggered magnet modes

  • US 5,529,578 A
  • Filed: 10/20/1995
  • Issued: 06/25/1996
  • Est. Priority Date: 12/09/1993
  • Status: Expired due to Term
First Claim
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1. A pulse generator, implantable in a patient, comprising:

  • a means for providing power;

    an output circuit, responsive to a triggering signal to generate an electrical stimulating pulse, said output circuit coupled to said means for providing power;

    at least one conductive lead, coupled to said output circuit, said conductive lead to conduct said stimulating pulse from said output circuit to a patient'"'"'s heart and to conduct an electrical signal generated by a cardiac event from said patient'"'"'s heart to said pulse generator;

    a sensing circuit, coupled to said conductive lead to sense an occurrence of a predetermined cardiac event and to issue a detection signal upon the sensing of said predetermined cardiac event;

    a remotely actuable switch having an output terminal, said switch having means for asserting a mode control signal on said output terminal when said switch is actuated;

    a control circuit, coupled to said output circuit, said sensing circuit, and to said remotely actuable switch output terminal, said control circuit having means for responding to assertion of said mode control signal to issue a series of said triggering signals wherein each two successive triggering signals in said series is separated in time by the lesser of;

    (a) a fixed pacing time interval; and

    (b) a time interval beginning with the first of said two successive triggering signals and ending with the issuance of said detection signal.

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