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High resolution intravascular signal detection

  • US 5,957,842 A
  • Filed: 06/07/1995
  • Issued: 09/28/1999
  • Est. Priority Date: 01/27/1994
  • Status: Expired due to Term
First Claim
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1. An elongated intravascular catheter for detecting electrical activity of a patient'"'"'s heart from within a blood vessel of the patient'"'"'s heart, comprising:

  • a) an elongated shaft having a distal end, proximal and distal sections, an inner lumen extending therein and the distal section having a maximum outer diameter of less than about 0.56 mm to be advanceable through a vein or artery of a patient'"'"'s heart;

    b) a longitudinally arranged array of at least four sensing electrodes spaced a distance from the distal end of the shaft, having axial lengths of about 0.25 to about 1 mm mounted on a length of the distal section having a substantially uniform interelectrode spacing of about 0.25 to about 0.75 mm;

    c) a core member within the shaft lumen;

    d) electrical conductors which transmit electrical activity sensed by the individual electrodes in the array of sensing electrodes; and

    e) an electrical connector on a proximal extremity of the shaft electrically connected to the electrical conductors.

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