Method and apparatus for performing mapping-type analysis including use of limited electrode sets
First Claim
1. A system for determining the probability of a patient having a coronary disease, comprising:
- a first set of electrodes for receiving a first set of cardiac signals from a patient;
computing means coupled to the first set of electrodes for transforming the first set of cardiac signals into a second set of cardiac signals such that the first set of cardiac signals appear as if they had been received from a reference set of electrodes;
means for storing a probability function that relates three or more statistically determined coefficients taken from a set of coefficients to the probability that a patient has a coronary disease;
means for multiplying the second set of cardiac signals by a predetermined set of basis functions to produce the three or more statistically determined coefficients; and
means for calculating the probability function with the values of the three or more statistically determined coefficients to calculate the probability of the patient having the coronary disease.
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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.
50 Citations
24 Claims
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1. A system for determining the probability of a patient having a coronary disease, comprising:
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a first set of electrodes for receiving a first set of cardiac signals from a patient; computing means coupled to the first set of electrodes for transforming the first set of cardiac signals into a second set of cardiac signals such that the first set of cardiac signals appear as if they had been received from a reference set of electrodes; means for storing a probability function that relates three or more statistically determined coefficients taken from a set of coefficients to the probability that a patient has a coronary disease; means for multiplying the second set of cardiac signals by a predetermined set of basis functions to produce the three or more statistically determined coefficients; and means for calculating the probability function with the values of the three or more statistically determined coefficients to calculate the probability of the patient having the coronary disease. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for determining the probability of a patient having a coronary disease, comprising the steps of:
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receiving a first set of cardiac signals from a first set of electrodes that are coupled to a patient; transforming the first set of cardiac signals into a second set of cardiac signals such that the first set of cardiac signals appear as if they had been received from a reference set of electrodes; storing a probability function that relates three or more statistically determined coefficients taken from a set of coefficients to the probability that a patient has a coronary disease; multiplying the second set of cardiac signals by a predetermined set of basis functions to produce the three or more statistically determined coefficients; and calculating the probability function with the values of the three or more statistically determined coefficients to calculate the probability of the patient having the coronary disease. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification