US 2004/0073262 A1 · Technique for discriminating between coordinated and uncoordinated cardiac rhythms

Abstract

A system and method for discriminating cardiac rhythms in sensed cardiac complexes associated with at least two cardiac signals, which includes at least two electrodes disposed at different locations in a heart for sensing at least two cardiac signals. A controller through a sensing circuit receives the sensed at least two cardiac signals from the electrodes and processes the sensed at least two cardiac signals to compute interelectrode time differences between the cardiac complexes associated with one of the at least two sensed cardiac signals, and corresponding cardiac complexes associated with the other of the at least two sensed cardiac signals. The controller further computes a detection time difference variability from the computed interelectrode detection time difference variabilities. Then the controller compares the computed detection time difference variability to a predetermined detection time difference variability threshold value to discriminate whether the sensed at least two cardiac signals have a coordinated or an uncoordinated cardiac rhythm.

Claims44

Dependent claims

A system, comprising:

at least two electrodes disposed at different locations in or around a heart to sense cardiac complexes associated with the at least two cardiac signals;
a signal sensing circuit, coupled to the at least two electrodes to receive and amplify the sensed cardiac complexes associated with at least two cardiac signals;
a controller, coupled to the signal sensing circuit, where the controller receives the amplified cardiac complexes associated with the at least two cardiac signals, and where the controller comprises:
an analyzer, to compute a set of interelectrode detection time differences using the sensed cardiac complexes associated with one of the at least two cardiac signals and the corresponding cardiac complexes associated with the other of the at least two cardiac signals for a predetermined time interval,
where the analyzer further computes a detection time difference variability using the computed set of interelectrode detection time differences of sensed complexes;
and
a comparator, coupled to the analyzer, to compare the computed detection time difference variability with a predetermined detection time difference variability threshold value, and issue a command signal based on the outcome of the comparison.

4 more elements

Dependencies are inferred from the claim text.

Technique for discriminating between coordinated and uncoordinated cardiac rhythms

Life of this patent

Technique for discriminating between coordinated and uncoordinated cardiac rhythms

Life of this patent

Abstract

Claims44