System for ventricular function abnormality detection and characterization
First Claim
1. A system for heart performance characterization and abnormality detection for a patient, comprising:
- an interface configured to receive signal data representing an electrical signal indicating electrical activity of a patient heart over a plurality of heart beat cycles;
a filter configured to extract;
first signal component data in a first selected bandwidth and first heart cycle portion of the received signal data andsecond signal component data in a different second selected bandwidth and second heart cycle portion of the received signal data;
a signal processor configured to;
determine a first value based on the first signal component data, the first value comprising a first energy value derived from the first signal component data or a first entropy value derived from the first signal component data, anddetermine a second value based on the second signal component data, the second value comprising second energy value derived from the second signal component data or a second entropy value derived from the first signal component data;
calculate a ratio of the first value to the second value;
a comparator configured to compare the calculated ratio or a value derived from the calculated ratio with a threshold value to provide a comparison indicator; and
a patient monitor configured to generate, in response to said comparison indicator indicating a calculated signal characteristic value exceeds the threshold value, an alert message associated with the threshold.
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Accused Products
Abstract
A system for heart performance characterization and abnormality detection includes an interface for receiving signal data representing an electrical signal indicating electrical activity of a patient heart over multiple heart beat cycles. A filter extracts first signal component data in a first selected bandwidth and first heart cycle portion of the received signal data and second signal component data in a different second selected bandwidth and second heart cycle portion of the received signal data. A signal processor uses the received signal data in calculating a ratio of a first value derived from the first signal component data to a second value derived from the second signal component data. A patient monitor in response to the calculated ratio or value derived from the calculated ratio, generates an alert message associated with the threshold.
27 Citations
23 Claims
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1. A system for heart performance characterization and abnormality detection for a patient, comprising:
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an interface configured to receive signal data representing an electrical signal indicating electrical activity of a patient heart over a plurality of heart beat cycles; a filter configured to extract; first signal component data in a first selected bandwidth and first heart cycle portion of the received signal data and second signal component data in a different second selected bandwidth and second heart cycle portion of the received signal data; a signal processor configured to; determine a first value based on the first signal component data, the first value comprising a first energy value derived from the first signal component data or a first entropy value derived from the first signal component data, and determine a second value based on the second signal component data, the second value comprising second energy value derived from the second signal component data or a second entropy value derived from the first signal component data; calculate a ratio of the first value to the second value; a comparator configured to compare the calculated ratio or a value derived from the calculated ratio with a threshold value to provide a comparison indicator; and a patient monitor configured to generate, in response to said comparison indicator indicating a calculated signal characteristic value exceeds the threshold value, an alert message associated with the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for heart performance characterization and abnormality detection, comprising:
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an interface configured to receive signal data representing an electrical signal indicating electrical activity of a patient heart over a plurality of heart beat cycles; a filter configured to extract first signal component data in a first selected bandwidth and first heart cycle portion of the received signal data and second signal component data in a different second selected bandwidth and second heart cycle portion of the received signal data; a signal processor configured to; determine a first value based on the first signal component data, the first value comprising a first energy value derived from the first signal component data or a first entropy value derived from the first signal component data, and determine a second value based on the second signal component data, the second value comprising second energy value derived from the second signal component data or a second entropy value derived from the first signal component data; calculate a ratio of the first value to the second value; and a patient monitor configured to generate, in response to comparing the calculated ratio or value derived from the calculated ratio with a threshold value, an alert message associated with the threshold.
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23. A method for heart performance characterization and abnormality detection, the method comprising:
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receiving signal data representing an electrical signal indicating electrical activity of a patient heart over a plurality of heart beat cycles; extracting first signal component data in a first selected bandwidth and first heart cycle portion of the received signal data and second signal component data in a different second selected bandwidth and second heart cycle portion of the received signal data; determining a first value based on the first signal component data, the first value comprising a first energy value derived from the first signal component data or a first entropy value derived from the first signal component data, and determining a second value based on the second signal component data, the second value comprising second energy value derived from the second signal component data or a second entropy value derived from the first signal component data; calculating a ratio of the first value to the second value; in response to comparing the calculated ratio or a value derived from the calculated ratio with a threshold value, generating an alert message associated with the threshold.
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Specification