System and method for a classifying cardiac complexes
AssigneeCardiac Pacemakers, Inc.
InventorsWilliam Hsu, Joseph Martin Smith
Life of this patent
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Abstract
A system and method classify cardiac complexes based on cardiac information derived from two or more cardiac signals. Two or more cardiac signals containing cardiac complexes are monitored. A cardiac complex in the two or more cardiac signals is isolated in an analysis window. The morphology of the cardiac complex in each of the two or more cardiac signals is then compared to the morphology of a template cardiac complex representing a predetermined cardiac condition. Based on this comparison, the cardiac complex is classified as either belonging or not belonging to the predetermined cardiac condition.
Claims39
A method, comprising:
- monitoring a first cardiac signal and a second cardiac signal;
- detecting a first cardiac complex in the first cardiac signal and a second cardiac complex in the second cardiac signal, the first and second cardiac complexes associated with the same heart contraction;
- creating at least one first template cardiac complex for the first cardiac signal and at least one second template cardiac complex for the second cardiac signal, wherein each of the first and second template cardiac complexes represents a predetermined cardiac rhythm state;
- comparing the first cardiac complex to the first template cardiac complex and the second cardiac complex to the second template cardiac complex to determine whether the heart contraction is representative of the predetermined cardiac rhythm state;
- and
- classifying the heart contraction as being representative of the predetermined cardiac rhythm state based on the comparison of the first cardiac complex to the first template cardiac complex and the second cardiac complex to the second template cardiac complex.
A method, comprising:
- monitoring a first cardiac signal and a second cardiac signal;
- detecting a first cardiac complex in the first cardiac signal and a second cardiac complex in the second cardiac signal, the first and second cardiac complexes associated with the same heart contraction;
- locating at least one first predetermined feature in the first cardiac complex and at least one second predetermined feature in the second cardiac complex;
- generating at least one characteristic quantity as a function of a position of at least one of the first and second predetermined features;
- and
- classifying the heart contraction as being representative of a predetermined cardiac rhythm state based at least in part on the characteristic quantity.
A system, comprising
- an amplifier to sense first and second cardiac signals;
- a detector, coupled to the amplifier, to detect first and second cardiac complexes in the respective first and second cardiac signals, the first and second cardiac complexes associated with the same heart contraction;
- a morphology analyzer, coupled to the detector, to locate at least one predetermined feature in a morphology of each of the first and second cardiac complexes;
- a comparator, coupled to the morphology analyzer, to compare the first and second cardiac complexes with respective first and second template cardiac complexes;
- and
- a processor, coupled to the comparator, to classify the heart contraction.
Dependencies are inferred from the claim text.