Device and method to detect the severity of ischemia and heart attack risk
AssigneeMedtronic, Inc.
InventorXiaohong Zhou
Life of this patent
Estimating the term…
Abstract
A device and method of detecting the severity of myocardial ischemia and heart attack risk is provided. The method includes obtaining an electrogram signal, determining T-wave measurements based on the electrogram signal, and determining ST segment measurements based on the electrogram signal. The method also includes identifying T-wave alternans based on the T-wave measurements and identifying ST segment changes based on the ST segment measurements. The method further includes correlating the T-wave alternans with the ST segment changes in order to detect a severity of ischemia.
Claims35
A method of detecting the severity of myocardial ischemia, the method comprising:
- obtaining an electrogram signal;
- determining T-wave measurements based on the electrogram signal;
- determining ST segment measurements based on the electrogram signal;
- identifying T-wave alternans based on the T-wave measurements;
- identifying ST segment changes based on the ST segment measurements;
- correlating the T-wave alternans with the ST segment changes;
- and
- detecting presence of ischemia and calculating a severity of the detected ischemia with a processor based at least on the correlation between the T-wave alternans and the ST segment changes.
An implantable medical device comprising:
- a data collection module configured to obtain an electrogram signal;
- a data processing module coupled to the data collection module,
- the data processing module configured to determine T-wave alternans based on the electrogram signal;
- the data processing module configured to determine ST segment changes based on the electrogram signal;
- the data processing module configured to detect presence of ischemia and a severity of the detected ischemia based at least on correlation between the T-wave alternans and the ST segment changes;
- and
- a therapy module coupled to the data processing module, the therapy module configured to at least one of deliver therapy and generate an alert indicating the severity of ischemia.
A non-transitory machine-readable storage medium comprising computer-executable instructions that, when executed, cause a processor to:
- obtain an electrogram signal;
- determine T-wave measurements based on the electrogram signal;
- determine ST segment measurements based on the electrogram signal;
- identify T-wave alternans based on the T-wave measurements;
- identify ST segment changes based on the ST segment measurements;
- correlate the T-wave alternans with the ST segment changes;
- and
- detect presence of ischemia and a severity of the detected ischemia based at least on the correlation between the T-wave alternans and the ST segment changes.
Dependencies are inferred from the claim text.