User feedback to controls ischemia monitoring ECG algorithm
First Claim
1. A method of mitigating false positive alerts for ischemic ECG patterns in an electrocardiogram (ECG) indicative of ischemia or myocardial infarction, comprising:
- receiving real-time ECG data;
measuring a level of noise associated with each of a plurality of ECG segments;
identifying a lowest-noise ECG segment, which has a lowest level of noise relative to other ECG segments in the plurality of ECG segments;
analyzing the lowest-noise ECG segment to detect one or more elevated ST segments therein;
upon detection of the one or more elevated ST segments, generating an alert;
presenting the lowest-noise ECG segment that triggered the alert to a user for review;
receiving user feedback regarding whether the alert is a false positive; and
adjusting an elevated ST segment detection algorithm as a function of the received user input such that elevated ST segments not indicative of ischemia or myocardial infarction are ignored.
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Abstract
When detecting ischemia and/or myocardial infarction in a subject, electrocardiogram (ECG) segments are analyzed for elevated ST segments indicative of ischemia and/or infarction. To mitigate false positive alerts, an ECG segment comprising an elevated ST segment that triggers an alert is presented to a clinician for verification as being indicative of ischemia or infarction, or as being attributable to a confounding condition not indicative of ischemia or infarction. Clinician feedback is used to adjust an elevated ST segment detection algorithm to improve accuracy and mitigate false positive alerts.
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Citations
19 Claims
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1. A method of mitigating false positive alerts for ischemic ECG patterns in an electrocardiogram (ECG) indicative of ischemia or myocardial infarction, comprising:
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receiving real-time ECG data; measuring a level of noise associated with each of a plurality of ECG segments; identifying a lowest-noise ECG segment, which has a lowest level of noise relative to other ECG segments in the plurality of ECG segments; analyzing the lowest-noise ECG segment to detect one or more elevated ST segments therein; upon detection of the one or more elevated ST segments, generating an alert; presenting the lowest-noise ECG segment that triggered the alert to a user for review; receiving user feedback regarding whether the alert is a false positive; and adjusting an elevated ST segment detection algorithm as a function of the received user input such that elevated ST segments not indicative of ischemia or myocardial infarction are ignored. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system that facilitates mitigating false positive alerts when monitoring ST elevation in an electrocardiogram (ECG) indicative of ischemia or myocardial infarction, comprising:
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a noise measurer configured to receive real-time ECG data and measure a level of noise associated with each of a plurality of ECG segments; a best periodic ECG identifier configured to receive the real-time ECG data and noise measurement information from the noise measurer, and identify a lowest-noise ECG segment, which has a lowest level of noise relative to other ECG segments in the plurality of ECG segments; an ECG analyzer configured to analyze the lowest-noise ECG segment to detect one or more elevated ST segments therein; an alert generator configured to generate an alert upon detection of the one or more elevated ST segments; a user interface on which the lowest-noise ECG segment that triggered the alert is presented to a user for review and via which the alert generator receives user feedback regarding whether the alert is a false positive; and a processor configured to adjust an elevated ST segment detection algorithm as a function of the received user input such that elevated ST segments not indicative of ischemia or myocardial infarction are ignored. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An alert generator device configured to generate alerts indicative of ischemia or myocardial infarction upon detection of elevated ST segments in an electrocardiogram (ECG), comprising:
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at least one measurement buffer configured to receive current ECG segment measurements and elevated ST segment information; an ST segment elevation change detector configured to receive the current ECG segment measurements and elevated ST segment information and receive delayed measurement and elevated ST segment information from the buffer for comparison; an infarct and ischemia detector configured to receive the current ECG segment measurements and elevated ST segment information and detect an elevated ST segment; a median filter configured to receive and combine ST elevation change information from the ST segment elevation change module and the detected elevated ST segment from the infarct and ischemia detection module, and generate an alert as a function of the received outputs; and an infarct and ischemia noise scorer configured to generate a probability indicative of a likelihood that the detected elevated ST segment is indicative of an ischemic or infarction event and output a predetermined ECG sample segment to a user interface for user confirmation that the alert is not a false positive. - View Dependent Claims (17, 18, 19)
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Specification