Method and system for automatically calibrating ischemia detection parameters
First Claim
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1. A method for automatically determining ischemia detection parameters, comprising:
- obtaining a baseline trace indicative of a cardiac behavior;
locating one of an R wave marker and a V wave marker in the baseline trace;
analyzing the baseline trace to identify slope changes between points in the baseline trace;
identifying a start point and end point in the baseline trace following the R wave or V wave marker as a function of the slope changes;
determining an ischemia detection window based on the start and end points within the baseline trace, the baseline trace including a baseline segment within the ischemia detection window; and
automatically determining a fiducial point by locating a fiducial point that yields a desired relation between the baseline segment and a new segment trace within the ischemia detection window, the ischemia detection window and fiducial point constituting ischemia detection parameters.
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Abstract
A method and system for automatically determining ischemia detection parameters are provided. The method includes obtaining a baseline trace indicative of a cardiac behavior, determining an ischemia detection window based on at least one physiologic state indicator within the baseline trace, and automatically identifying a fiducial point based on the baseline segment trace. The baseline trace includes a baseline segment within the ischemia detection window; where the ischemia detection window and the fiducial point may constitute ischemia detection parameters.
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Citations
16 Claims
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1. A method for automatically determining ischemia detection parameters, comprising:
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obtaining a baseline trace indicative of a cardiac behavior; locating one of an R wave marker and a V wave marker in the baseline trace; analyzing the baseline trace to identify slope changes between points in the baseline trace; identifying a start point and end point in the baseline trace following the R wave or V wave marker as a function of the slope changes; determining an ischemia detection window based on the start and end points within the baseline trace, the baseline trace including a baseline segment within the ischemia detection window; and automatically determining a fiducial point by locating a fiducial point that yields a desired relation between the baseline segment and a new segment trace within the ischemia detection window, the ischemia detection window and fiducial point constituting ischemia detection parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for automatically determining ischemia detection parameters, comprising:
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memory storing cardiac signals representative of cardiac activity of a patient over a period of time; a processor configured to; obtain a baseline composite trace indicative of a cardiac behavior; locate one of an R wave marker and a V wave marker in the baseline trace; analyze the baseline trace to identify slope changes between points in the baseline trace; identify a start point and end point in the baseline trace following the R wave or V wave marker as a function of the slope changes; determine an ischemia detection window based on the start and end points within the baseline composite trace, the baseline composite trace including a baseline segment within the ischemia detection window; automatically identify a fiducial point by locating a fiducial point that gives a maximum difference between data values of the baseline segment and an actual segment trace; and an output to present potential ischemia detection parameters. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification