Detection of heart failure decompensation based on cumulative changes in sensor signals
First Claim
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1. A method, comprising:
- acquiring sensor data associated with one or more symptoms of heart failure;
calculating a cumulative sum from the sensor data;
evaluating the cumulative sum to determine a change in the one or more heart failure symptoms by comparing the cumulative sum to one or both of a threshold and a V-mask, wherein the cumulative sum exceeding the threshold or the V-mask indicates change in the one or more heart failure symptoms; and
generating an output in response to the cumulative sum exceeding one or both of the threshold and the V-mask, wherein generating the output comprises at least one of triggering an alert and changing delivery of a therapy, wherein at least one of evaluating, comparing, and generating is implemented at least in part by circuitry.
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Abstract
Systems, devices and methods provide for evaluation of heart failure symptoms. Sensor data associated with one or more symptoms of heart failure are acquired and trended. Statistical features, such as slope, are extracted from the data trend in a moving window and are used to develop a cumulative sum. The cumulative sum is compared to a threshold value or V-mask to detect a shift in cumulative sum indicating changes in heart failure symptoms. A shift beyond the threshold value may trigger an alert or implementation of therapy.
131 Citations
27 Claims
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1. A method, comprising:
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acquiring sensor data associated with one or more symptoms of heart failure; calculating a cumulative sum from the sensor data; evaluating the cumulative sum to determine a change in the one or more heart failure symptoms by comparing the cumulative sum to one or both of a threshold and a V-mask, wherein the cumulative sum exceeding the threshold or the V-mask indicates change in the one or more heart failure symptoms; and generating an output in response to the cumulative sum exceeding one or both of the threshold and the V-mask, wherein generating the output comprises at least one of triggering an alert and changing delivery of a therapy, wherein at least one of evaluating, comparing, and generating is implemented at least in part by circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A medical device, comprising:
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sensing circuitry configured to acquire sensor data associated with one or more symptoms of heart failure; and a diagnostics processor configured to calculate a cumulative sum of the sensor data, evaluate the cumulative sum to determine whether the cumulative sum exceeds one or both of a threshold and a V-mask indicating change in one or more heart failure symptoms, and generate an output in response to the cumulative sum exceeding one or both of the threshold and the V-mask. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A medical system, comprising:
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means for acquiring sensor data associated with one or more symptoms of heart failure; means for calculating a cumulative sum of the sensor data; means for evaluating the cumulative sum to determine a change in the cumulative sum relative to one or both of a threshold and a V-mask, wherein the cumulative sum exceeding the threshold or V-mask indicates a change in one or more heart failure symptoms; and means for generating an output in response to the cumulative sum exceeding one or both of the threshold and the V-mask. - View Dependent Claims (24, 25, 26, 27)
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Specification