System and method for determining changes in a body state
First Claim
1. A computer-implemented method for determining changes in a body state of an individual, comprising:
- receiving a signal from a monitoring system, the signal indicating a measurement of cardiac activity over a period of time;
identifying a signal feature that repeats in the signal over the period of time;
calculating a plurality of first intervals, wherein each first interval in the plurality of first intervals is calculated between successive signal features in the signal;
calculating a plurality of second intervals, wherein each second interval in the plurality of second intervals is calculated between successive first intervals in the plurality of first intervals;
calculating a derivative based on the plurality of second intervals; and
identifying changes in the body state based on the derivative.
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Abstract
A method and a system for determining changes in a body state of an individual including receiving a signal from a monitoring system, where the signal indicates a measurement of cardiac activity of the individual over a period of time and determining at least one signal feature, where the signal feature is a reoccurring event of the signal over the period of time. The method also includes determining a first interval between two successive signal features and determining a second interval between two successive first intervals. A derivative is calculated based on the second interval. Changes in the body state are identified based on the derivative.
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Citations
23 Claims
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1. A computer-implemented method for determining changes in a body state of an individual, comprising:
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receiving a signal from a monitoring system, the signal indicating a measurement of cardiac activity over a period of time; identifying a signal feature that repeats in the signal over the period of time; calculating a plurality of first intervals, wherein each first interval in the plurality of first intervals is calculated between successive signal features in the signal; calculating a plurality of second intervals, wherein each second interval in the plurality of second intervals is calculated between successive first intervals in the plurality of first intervals; calculating a derivative based on the plurality of second intervals; and identifying changes in the body state based on the derivative. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer-implemented method for analyzing transitions in a body state, comprising:
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receiving a signal from an individual indicating a measurement of cardiac activity over a period of time, wherein the signal includes a signal feature that repeats in the signal; calculating a plurality of first intervals, wherein each first interval in the plurality of first intervals is calculated between successive signal features in the signal; calculating a plurality of second intervals, wherein each second interval in the plurality of second intervals is calculated between successive first intervals in the plurality of first intervals; calculating a derivative based on the plurality of second intervals; extracting a plurality of heart rate accelerations or decelerations based on the derivative; and identifying a transition in the body state based on the plurality of heart rate accelerations or decelerations. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A computer system for determining changes in a body state of an individual, comprising:
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a monitoring system configured to monitor cardiac activity; a signal receiving module configured to receive a signal from the monitoring system, the signal representing a measurement of cardiac activity over a period of time; a feature determination module configured to identify signal features that reoccur in the signal over the period of time; an interval determination module configured to calculate respective first intervals between successive signal features and respective second intervals between successive first intervals; a derivative calculation module configured to calculate a derivative of a heart rate based on the second intervals; and an identification module configured to identify changes in the body state based on the derivative. - View Dependent Claims (17, 18, 19, 20)
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21. A non-transitory computer-readable medium storing computer-executable instructions that when executed by a computer, which includes at least a processor, cause the computer to perform a method, the method comprising:
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receiving, using at least the processor, a signal indicating a plurality of cardiac cycles of an individual over a period of time; detecting, using at least the processor, a signal feature, wherein the signal feature is a reoccurring event in the signal over the period of time; calculating, using at least the processor, a plurality of first intervals, wherein each first interval in the plurality of first intervals is calculated between successive signal features; calculating, using at least the processor, a plurality of second intervals, wherein each second interval in the plurality of second intervals is calculated between successive first intervals in the plurality of first intervals; calculating, using at least the processor, a derivative based on the plurality of second intervals; and identifying, using at least the processor, changes in a body state based on the derivative. - View Dependent Claims (22, 23)
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Specification