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Dual chamber pacing with interchamber delay

  • US 5,720,768 A
  • Filed: 05/22/1996
  • Issued: 02/24/1998
  • Est. Priority Date: 05/22/1996
  • Status: Expired due to Term
First Claim
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1. A method for determining the origin of a cardiac signal in a heart, comprising the steps of:

  • providing first and second electrodes connected to said heart, and a third electrode referenced outside said heart;

    providing said first electrode for sensing a first chamber of said heart;

    providing said second electrode for sensing a second chamber of said heart;

    sensing for said cardiac signal while said first and second electrodes are in a bipolar configuration;

    detecting said cardiac signal with said first and second electrodes;

    switching both said first and second electrodes to a unipolar configuration after detecting said cardiac signal; and

    sensing for said cardiac signal between said first and second electrodes and said third electrode in said unipolar configuration; and

    determining the origin of said cardiac signal in one of said first and second chambers.

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