ECG signal power vector detection of ischemia or infarction
First Claim
1. A system comprising:
- a processor including;
a cardiac signal vector module configured to measure, from an electrical cardiac signal, a first dominant vector corresponding to a direction and magnitude of maximum signal power of an ST-T first segment of at least one cardiac cycle of a subject and at least a second dominant vector corresponding to a direction and magnitude of maximum signal power of a P-QRS second segment of the cardiac cycle, wherein the P-QRS segment includes the P-wave and extends to and includes the S-wave; and
an ischemia detection module configured to measure a change in the first dominant vector and the second dominant vector, to form a difference by subtracting a measured change in the second dominant vector from the measured change in the first dominant vector, and to declare whether an ischemic event occurred using the difference.
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Abstract
A system comprising a processor that includes a cardiac signal vector module and an ischemia detection module. The cardiac signal vector module is configured to measure a first dominant vector corresponding to a direction and magnitude of maximum signal power of a first segment of at least one cardiac cycle of a subject and at least a second dominant vector corresponding to a direction and magnitude of maximum signal power of a second segment of the cardiac cycle from an electrical cardiac signal. The ischemia detection module is configured to measure a change in the first dominant vector, to form a difference by subtracting a measured change in the second dominant vector from a measured change in the first dominant vector, and to declare whether an ischemic event occurred using the difference.
90 Citations
20 Claims
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1. A system comprising:
a processor including; a cardiac signal vector module configured to measure, from an electrical cardiac signal, a first dominant vector corresponding to a direction and magnitude of maximum signal power of an ST-T first segment of at least one cardiac cycle of a subject and at least a second dominant vector corresponding to a direction and magnitude of maximum signal power of a P-QRS second segment of the cardiac cycle, wherein the P-QRS segment includes the P-wave and extends to and includes the S-wave; and an ischemia detection module configured to measure a change in the first dominant vector and the second dominant vector, to form a difference by subtracting a measured change in the second dominant vector from the measured change in the first dominant vector, and to declare whether an ischemic event occurred using the difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification