System and methods of hierarchical cardiac event detection
First Claim
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1. A method for assessing the condition of the heart of a human patient, the method comprising the steps of:
- receiving an electrogram reflecting the electrical activity within the patient'"'"'s heart,applying a hierarchical classification scheme to the electrogram based on different features of the electrogram, thereby determining a category for the electrogram, wherein the hierarchical classification scheme comprises a series of classification tests;
estimating the heart'"'"'s condition based on the category.
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Abstract
A system for the detection of cardiac events occurring in a human patient is provided. At least two electrodes are included in the system for obtaining an electrical signal from a patient'"'"'s heart. An electrical signal processor is electrically coupled to the electrodes for processing the electrical signal. An electrogram analysis scheme is described, according to which electrogram segments or individual beats are classified according to various features, and different cardiac event tests are applied based on this classification.
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Citations
31 Claims
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1. A method for assessing the condition of the heart of a human patient, the method comprising the steps of:
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receiving an electrogram reflecting the electrical activity within the patient'"'"'s heart, applying a hierarchical classification scheme to the electrogram based on different features of the electrogram, thereby determining a category for the electrogram, wherein the hierarchical classification scheme comprises a series of classification tests; estimating the heart'"'"'s condition based on the category. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for detecting a cardiac event, the method comprising the steps of:
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a) receiving an electrogram reflecting the electrical activity within the patient'"'"'s heart, b) computing a plurality of heart signal feature values from the electrogram; c) comparing each of a first set of said plurality of heart signal feature values with a corresponding range within a first set of ranges, wherein the values in the first set of ranges are selected to form a combination which is associated with a cardiac event, and wherein the first set of said plurality of heart signal feature values comprises at least two heart signal feature values; d) comparing each of a second set of said plurality of heart signal feature values with a corresponding range within at a second set of ranges, wherein the values in the second set of ranges are selected to form a combination which is associated with the cardiac event, and wherein the second set of said plurality of heart signal feature values comprises at least two heart signal feature values; wherein a first one of the ranges in the first set of ranges does not overlap a corresponding range in the second set of ranges, and wherein the first one of the ranges pertains to a heart signal feature other than heart rate, and wherein at least one heart signal feature value in the second set is not within the first set; e) detecting the cardiac event based on the outcome of steps b and c. - View Dependent Claims (16, 17, 18)
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19. A method for assessing the condition of the heart of a human patient, the method comprising the steps of:
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receiving an electrogram, applying a classification scheme to the electrogram based on a plurality of features of the electrogram, thereby determining a category for the electrogram, wherein the category is one of a set of non-overlapping categories; and
,estimating the heart'"'"'s condition based on the category. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for detecting a cardiac event, the method comprising the steps of:
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a) receiving an electrogram reflecting the electrical activity within the patient'"'"'s heart, b) computing a plurality of heart signal feature values from the electrogram; c) comparing each of a first set of said plurality of heart signal feature values with a corresponding range within a first set of ranges, wherein the values in the first set of ranges are selected to form a combination which is associated with a cardiac event, and wherein the first set of said plurality of heart signal feature values comprises at least two heart signal feature values; d) comparing each of a second set of said plurality of heart signal feature values with a corresponding range within at a second set of ranges, wherein the values in the second set of ranges are selected to form a combination which is associated with the cardiac event, and wherein the second set of said plurality of heart signal feature values comprises at least two heart signal feature values; wherein a first one of the ranges in the first set of ranges does not overlap a corresponding range in the second set of ranges, and wherein the first one of the ranges pertains to a heart signal feature other than heart rate, and wherein an increase in a first heart signal feature value in the first set is associated with a cardiac event according to the first set of ranges whereas a decrease in the first heart signal feature value in the second set is associated with a cardiac event according to the second set of ranges; e) detecting the cardiac event based on the outcome of steps b and c. - View Dependent Claims (29, 30, 31)
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Specification