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System for sensing electrical depolarization wave signals and their direction

  • US 4,754,753 A
  • Filed: 11/12/1985
  • Issued: 07/05/1988
  • Est. Priority Date: 05/12/1981
  • Status: Expired due to Term
First Claim
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1. A system for sensing the direction of propagation of depolarization waves within the heart, comprising:

  • an elongated insulative lead body having a proximal end and a distal end;

    first electrode mounted to said lead body;

    second electrode mounted to said lead body, displaced 180 degrees circumferentially from said first electrode;

    third electrode mounted to said lead body, displaced from said first and second electrodes;

    fourth electrode mounted to said lead body, displaced axially from said third electrode, wherein said first, second, third and fourth electrodes are mounted to section of said lead body of length insertable within a single chamber of a human heart;

    indifferent electrode means for electrically contacting the body and providing an electrically common reference point outside said chamber of said heart;

    first sensing means electrically coupled to said first electrode and to said indifferent electrode means for sensing the arrival of a depolarization wave at said first electrode and for generating a first sensing signal in response thereto;

    second sensing means electrically coupled to said second electrode and to said indifferent electrode means for sensing the arrival of said depolarization wave at said second electrode and for generating a second sensing signal indicative thereof;

    third sensing means electrically coupled to said third electrode and to said indifferent elctrode for sensing the arrival of said depolarization wave at said third electrode and for generating a third sensing signal indicative thereof;

    fourth sensing means electrically coupled to said fourth electrode and to said indifferent electrode means for sensing the arrival of said depolarization wave at said fourth electrode and for generating a fourth sensing means signal indicative thereof; and

    direction determining means coupled to said first, second, third, and fourth sensing means for determining the direction of propagation of said depolarization wave within said chamber of said human heart in response to said first, second, third and fourth sensing signals, wherein said direction determining means comprises;

    first order determining means coupled to said first and second sensing means for determining the order of occurrence of said first and second sensing signals and generating a first directional signal indicative thereof; and

    second order determining means coupled to said third and fourth sensing means for determining the order of occurrence of said third and fourth sensing signals and for generating a second directional signal indicative thereof.

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