×

Adaptive windowing for cardiac waveform discrimination

  • US 8,145,296 B2
  • Filed: 08/10/2009
  • Issued: 03/27/2012
  • Est. Priority Date: 04/28/2005
  • Status: Active Grant
First Claim
Patent Images

1. A method of operating a cardiac device, comprising:

  • sensing a cardiac signal that follows a pacing pulse;

    detecting at least one feature of the cardiac signal;

    comparing the cardiac signal feature to a detection window;

    determining a cardiac response to the pacing pulse based on comparison of the cardiac signal feature to the detection window;

    prior to the comparison of the cardiac signal feature to the detection window, defining a preferred direction for modifying the detection window;

    modifying the detection window more aggressively toward the cardiac signal feature if the preferred direction is toward the cardiac signal feature and modifying the detection window less aggressively toward the cardiac signal feature if the preferred direction is not toward the cardiac signal feature;

    using the modified detection window to determine a subsequent cardiac pacing response to a subsequent pacing pulse; and

    delivering pacing therapy based on the cardiac pacing response.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×