Method and apparatus for performing mapping-type analysis including use of limited electrode sets
First Claim
1. A system for receiving a first set of electrical signals received from a patient at less than eleven electrodes, including a limb electrode set and a precordial electrode set, to obtain information that is conventionally available from a second set of electrical signals collected from 192 electrodes, said system comprising:
- transformation means for receiving the first set of electrical signals and for transforming the first set of electrical signals into a map-type data set representative of the second set of electrical signals; and
extraction means for extracting at least one feature from said map-type data set.
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Accused Products
Abstract
A system (10) is disclosed that includes a monitor (16) for use in performing 12-lead electrocardiographic (ECG) and body surface mapping (BSM) analyses on a patient (12) with a single ten-electrode cable set (14). The monitor receives nine leads of data from the electrode cable set and initially preprocesses it to simplify further analysis. Then the data is transformed to produce a spatial distribution relative to the patient'"'"'s chest, representative of the data that would be collectible with a 192-electrode set. Feature extraction techniques are also described for use in evaluating transformed, as well as conventional, BSM data with respect to clinically evaluated populations. In that regard, features of interest are extracted from the data and statistically analyzed to detect select cardiac conditions.
105 Citations
40 Claims
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1. A system for receiving a first set of electrical signals received from a patient at less than eleven electrodes, including a limb electrode set and a precordial electrode set, to obtain information that is conventionally available from a second set of electrical signals collected from 192 electrodes, said system comprising:
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transformation means for receiving the first set of electrical signals and for transforming the first set of electrical signals into a map-type data set representative of the second set of electrical signals; and extraction means for extracting at least one feature from said map-type data set.
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2. A system for receiving a first set of electrical signals received from a patient at less than twenty electrodes to obtain information that is conventionally available from a second set of electrical signals collected from a greater number of electrodes, said system comprising:
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(a) transformation means for receiving the first set of electrical signals and for transforming the first set of electrical signals into a map-type data set representative of the second set of electrical signals; (b) extraction means for extracting at least one feature from said map-type data set, said extraction means further comprising; (i) compression means for compressing said map-type data set to produce a compressed data set including at least one data subset suitable for use in extracting said feature; (ii) selection means for selecting said at least one data subset from said compressed data set; and (iii) output means for processing said at least one data subset to generate a signal representative of the presence of said feature in said map-type data set. - View Dependent Claims (3, 4, 5)
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6. A method of processing information that is spatially representative of the electrical activity of a patient'"'"'s heart to detect the presence of at least one cardiac characteristic of interest, said method comprising the steps of:
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(a) producing a data set, from the information that is spatially representative of the electrical activity of the patient'"'"'s heart, that is usable in representing the information, said step of producing said data set comprising the steps of; (i) identifying a set of basis functions that are usable in representing the information that is spatially representative of the electrical activity of the patient'"'"'s heart; (ii) combining said set of basis functions and the information that is spatially representative of the electrical activity of the patient'"'"'s heart to produce a group of coefficients; and (b) identifying a data subset, from said data set, that is usable in detecting the cardiac characteristic of interest, and computing a feature value, for use in detecting the presence of the cardiac characteristic of interest, from said subset. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method of collecting and processing information that is spatially representative of the electrical activity of a patient'"'"'s heart to detect the presence of at least one cardiac characteristic of interest, said method comprising the steps of;
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(a) collecting data from the patient containing the information that is spatially representative of the electrical activity of the patient'"'"'s heart; (b) producing a data set, from the information that is spatially representative of the electrical activity of the patient'"'"'s heart, that is usable in representing the information, said step of producing said data set comprising the steps of; (i) identifying a set of basis functions that are usable in representing the information that is spatially representative of the electrical activity of the patient'"'"'s heart; (ii) combining said set of basis functions and the information that is spatially representative of the electrical activity of the patient'"'"'s heart to produce a group of coefficients; and (c) identifying a data subset, from said data set, that is usable in detecting the cardiac characteristic of interest; and (d) computing a feature value, for use in detecting the presence of the cardiac characteristic of interest, from said subset. - View Dependent Claims (38, 39, 40)
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Specification