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High resolution intravascular signal detection

  • US 5,711,298 A
  • Filed: 02/24/1997
  • Issued: 01/27/1998
  • Est. Priority Date: 01/27/1994
  • Status: Expired due to Term
First Claim
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1. A method of detecting electrical activity of a patient'"'"'s heart from within a blood vessel thereof, comprising:

  • a) introducing into a patient'"'"'s vasculature an intravascular catheter which hasan elongated catheter shaft having proximal and distal ends, a first array of sensing electrodes on a distal section having a relatively small interelectrode spacing and a second array of sensing electrodes on the distal section with an interelectrode spacing which is larger than the interelectrode spacing in the first array, and means to transmit electrical activity sensed by the individual electrodes in the first array and the second array to electrical connector means on a proximal extremity of the shaft;

    b) advancing the catheter within the patient'"'"'s vasculature until the distal section of such catheter is disposed within a first coronary artery or cardiac vein of the patient'"'"'s heart;

    c) detecting electrical activity of the patient'"'"'s heart from within the cardiac vein or the coronary artery by means of the electrodes in the second array of sensing electrodes to detect a general region within the patient'"'"'s heart where the electrical activity is located; and

    d) detecting electrical activity of the patient'"'"'s heart from within the cardiac vein or the coronary artery by means of the sensing electrodes in the first array of sensing electrodes to more accurately detect the location within the patient'"'"'s heart of the electrical activity.

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