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HYBRID BIPOLAR/UNIPOLAR DETECTION OF ACTIVATION WAVEFRONT

  • US 20150208938A1
  • Filed: 01/29/2014
  • Published: 07/30/2015
  • Est. Priority Date: 01/29/2014
  • Status: Active Grant
First Claim
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1. A method, comprising the steps of:

  • inserting a probe into a heart of a living subject, the probe having electrodes;

    recording a bipolar electrogram and a unipolar electrogram from a location in the heart with the electrodes;

    defining a time interval comprising a window-of-interest;

    differentiating the bipolar electrogram and the unipolar electrogram with respect to time to define a differentiated bipolar electrogram and a differentiated unipolar electrogram, respectively;

    identifying peaks within the window-of-interest in the differentiated bipolar electrogram;

    establishing a bipolar activity window about respective peaks, the bipolar activity window having activity bounds that include activity about the peaks in the bipolar electrogram; and

    identifying an extreme negative value (−

    dV/dt) in the differentiated unipolar electrogram within the activity bounds, and reporting a time corresponding to the value as a unipolar activation onset.

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