×

Closed loop impedance-based cardiac resynchronization therapy systems, devices, and methods

  • US 8,126,548 B2
  • Filed: 01/18/2008
  • Issued: 02/28/2012
  • Est. Priority Date: 05/25/2005
  • Status: Active Grant
First Claim
Patent Images

1. A machine-assisted method comprising:

  • measuring a first impedance signal, the first impedance signal indicative of a volume of a first ventricle of a heart as the first ventricle expands and contracts during a cardiac cycle;

    using the first impedance signal to measure a maximum rate of change of volume of the first ventricle occurring exclusively in a systole portion of a cardiac cycle; and

    automatically adjusting, using the maximum rate of change of volume, at least one cardiac resynchronization therapy parameter that synchronizes left and right ventricular heart contractions, the automatically adjusting tending to increase the maximum rate of change in the volume over at least one subsequent cardiac cycle.

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