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Bipolar mapping of intracardiac potentials with electrode having blood permeable covering

  • US 6,408,199 B1
  • Filed: 07/07/2000
  • Issued: 06/18/2002
  • Est. Priority Date: 07/07/2000
  • Status: Expired due to Term
First Claim
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1. A system for determining an arrhythmiogenic focus in heart tissue comprising:

  • a catheter comprising;

    (i) an elongated body having a distal region;

    (ii) a first electrode mounted on the distal region for obtaining a first signal;

    (iii) a second electrode mounted on the distal region in close proximity to and electrically isolated from the first electrode for obtaining a second signal, the second electrode being covered by a blood-permeable membrane that, in use, prohibits direct contact between the second electrode and surrounding heart tissue; and

    a signal processing unit operatively connected to the catheter for comparing the first signal and the second signal and subtracting far-field activity from the first signal for obtaining near-field electrical activity and identifying a location of an arrhythmiogenic focus based on near-field electrical activity.

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