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Method and apparatus to automatically optimize the pacing mode and pacing cycle parameters of a dual chamber pacemaker

  • US 5,540,727 A
  • Filed: 11/15/1994
  • Issued: 07/30/1996
  • Est. Priority Date: 11/15/1994
  • Status: Expired due to Term
First Claim
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1. Apparatus for establishing an optimum pacing parameter value for an implantable, programmable, cardiac stimulating device, comprising:

  • (a) means for sensing respiratory activity of said patient;

    (b) means for measuring at least one of a plurality of physiologic parameters and producing signals proportional to an average value of said at least one of said plurality of physiologic parameters over a predetermined time interval that includes an integral number of complete respiratory cycles;

    (c) control means connected to said sensing means and said measuring means for incrementally changing a pacing parameter of said cardiac stimulating device by a predetermined increment value and storing said signals measured by said means for measuring associated with each incremental change of said pacing parameter until said pacing parameter reaches a predetermined limit, said control means being programmable to a plurality of pacing modes;

    (d) means operatively coupled to said control means for comparing the signals stored to determine an optimum value thereof; and

    (e) means for sequentially selecting one of said plurality of pacing modes for said cardiac stimulating device, said measuring means, control means and comparing means being operative to determine one of a maximum and minimum value of said signals for each of said plurality of pacing modes; and

    (f) means for setting the pacing mode of said cardiac stimulator to the particular mode associated with said one of the maximum and minimum value of said stored signals for all of said plurality of pacing modes said pacing modes include pacing the atrium and pacing in one ventricle, pacing the atrium and pacing both ventricles, sensing the atrium and pacing one ventricle, sensing the atrium and pacing both ventricles, and pacing both atria.

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