Method and apparatus for detecting electrocardiographic abnormalities based on monitored high frequency QRS potentials
First Claim
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1. A method of detecting ischemia, the method comprising:
- sensing an electrocardiogram (ECG) signal;
extracting low-frequency components associated with the sensed ECG signal;
detecting premature ventricular contraction (PVC) beats in the low-frequency components;
incrementing a PVC counter in response to each detected PVC beat on a beat-by-beat basis;
extracting high-frequency components associated with the sensed ECG signal, wherein extracting high-frequency components includes extracting high frequency components associated with QRS complex portions of the sensed ECG signal (HF QRS) and rejecting QRS complex portions associated with detected PVC beats;
detecting a reduced amplitude zone (RAZ) in the HF QRS on a beat-by-beat basis;
incrementing a counter in response to each detected RAZ; and
identifying potential ischemia based on the PVC counter and the RAZ counter.
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Abstract
A system and method of monitoring electrocardiogram (ECG) signals and detecting ischemic conditions. In particular, high-frequency components and low-frequency components are extracted from the monitored ECG signal. The high-frequency components are analyzed to detect reduced amplitude zones (RAZs), while the low-frequency components are utilized to detect premature ventricular contraction (PVC) beats. Potentially ischemic conditions are identified based on both RAZs and PVC beats detected.
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7 Claims
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1. A method of detecting ischemia, the method comprising:
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sensing an electrocardiogram (ECG) signal; extracting low-frequency components associated with the sensed ECG signal; detecting premature ventricular contraction (PVC) beats in the low-frequency components; incrementing a PVC counter in response to each detected PVC beat on a beat-by-beat basis; extracting high-frequency components associated with the sensed ECG signal, wherein extracting high-frequency components includes extracting high frequency components associated with QRS complex portions of the sensed ECG signal (HF QRS) and rejecting QRS complex portions associated with detected PVC beats; detecting a reduced amplitude zone (RAZ) in the HF QRS on a beat-by-beat basis; incrementing a counter in response to each detected RAZ; and identifying potential ischemia based on the PVC counter and the RAZ counter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification