Back to results
US 7,890,169 B2Granted
Cardiac rhythm management system selecting between multiple same-chamber electrodes for delivering cardiac therapy
AssigneeCardiac Pacemakers, Inc.
InventorsJiang Ding, Julio C. Spinelli, Andrew P. Kramer
Life of this patent
Estimating the term…
Abstract
A cardiac rhythm management system selects one of multiple electrodes associated with a particular heart chamber based on a relative timing between detection of a depolarization fiducial point at the multiple electrodes, or based on a delay between detection of a depolarization fiducial point at the multiple electrodes and detection of a reference depolarization fiducial point at another electrode associated with the same or a different heart chamber. Subsequent contraction-evoking stimulation therapy is delivered from the selected electrode.
Claims20
A method including:
- detecting, from a first electrode associated with a first heart chamber, a first fiducial point associated with a first depolarization of the first heart chamber during a first cardiac cycle;
- detecting, from a second electrode associated with a second heart chamber, a second fiducial point associated with a second depolarization of the second heart chamber during the first cardiac cycle;
- detecting, from the first electrode associated with the first heart chamber, a third fiducial point associated with a third depolarization of the first heart chamber during a second cardiac cycle, and in which the first and third fiducial points are substantially similarly located on the respective first and third depolarizations;
- detecting, from a third electrode associated with the second heart chamber, a fourth fiducial point associated with a fourth depolarization of the second heart chamber during the second cardiac cycle, in which the second and fourth fiducial points are substantially similarly located on the respective second and fourth depolarizations
- measuring a first time difference between the first and second fiducial points;
- measuring a second time difference between the third and fourth fiducial points;
- selecting the second electrode if the first time difference is longer than the second time difference, and selecting the third electrode if the second time difference is longer than the first time difference;
- and
- delivering from a selected electrode a subsequent stimulation for evoking a contraction of the second heart chamber.
6 more elements
A system including:
- a first electrode configured to be associated with a first heart chamber;
- second and third electrodes, both configured to be associated with a second heart chamber;
- a sensing circuit, coupled to the first, second, and third electrodes, the sensing circuit detecting heart depolarizations from the first and second chambers;
- a timer, coupled to the sensing circuit, the timer measuring a first time interval between a first depolarization received at the first electrode during a first cardiac cycle and a subsequent second depolarization received at the second electrode during the first cardiac cycle, and measuring a second time interval between a third depolarization received at the first electrode during a second cardiac cycle and a subsequent fourth depolarization received at the third electrode during the second cardiac cycle;
- a therapy circuit delivering stimulations for evoking heart contractions from one of the second and third electrodes;
- and
- a controller, coupled to the timer, the controller selecting the second electrode if the first time interval is longer than the second time interval, and selecting the third electrode if the second time interval is longer than the first time interval, the controller coupling the therapy circuit to the selected one of the second and third electrodes for delivering the stimulations.
4 more elements
Dependencies are inferred from the claim text.