Electrocardiogram (“ECG”) signal analysis and S-T segment measurement
AssigneeDrägerwerk AG & Co. KGaA
InventorsYu Chen, Haisheng Lu
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Abstract
A method of processing of electrocardiogram (“ECG”) signals from at least one ECG lead connected to a patient includes computing an average beat from a plurality of beats occurring during a predetermined averaging interval. An onset point, isoelectric point, and a J-point of the average beat is computed to establish an S-T segment of the average beat. The isoelectric point and the J-point of the average beat are used to determine an S-T segment for each beat of the averaging interval, and the average of the S-T segments of each beat is computed and averaged with the S-T segment of the average beat.
Claims20
A method of processing of electrocardiogram (“ECG”) signals from a plurality of ECG leads connected to a patient, comprising:
- selecting at least one lead to provide an ECG signal from the patient;
- and
- for each of the at least one selected leads:
- computing an average beat from a plurality of beats occurring during a predetermined averaging interval;
- determining an onset point and a J-point of the average beat;
- computing an interval complex measurement reflecting an S-T segment of the average beat based on the determined onset point and J-point;
- computing an isoelectric point of the average beat relative to the computed onset point;
- computing an S-T segment separately for each beat during the averaging interval using the isoelectric point and J-point of the average beat;
- sorting the computed S-T segments of each beat and discarding upper and lower marginal values;
- computing an each beat averaged measurement comprising an average of undiscarded S-T segments;
- computing an average of the interval complex measurement and the each beat averaged measurement;
- and
- reporting the computed average of the interval complex measurement and the each beat averaged measurement to a clinician.
A physiological monitoring system for processing electrocardiogram (“ECG”) signals from a plurality of ECG leads connected to a patient, comprising:
- at least one lead for providing an ECG signal from the patient;
- signal processing circuitry coupled to each of the at least one selected leads, the signal processing circuitry configured to:
- compute an average beat from a plurality of beats occurring during a predetermined averaging interval;
- determine an onset point and a J-point of the average beat;
- computing an isoelectric point of the average beat relative to the onset point;
- compute an interval complex measurement reflecting an S-T segment of the average beat based on the determined isoelectric point and J-point;
- compute an S-T segment separately for each beat during the averaging interval using the onset point and the J-point of the average beat;
- sort the computed S-T segments of each beat and discarding upper and lower marginal values;
- compute an each beat averaged measurement comprising an average of undiscarded S-T segments;
- compute an average of the interval complex measurement and the each beat averaged measurement;
- and
- report the computed average of the interval complex measurement and the each beat averaged measurement to a clinician.
A computer-readable medium tangibly embodying instructions that, when executed by a processor, performs a method of processing of electrocardiogram (“ECG”) signals from a plurality of ECG leads connected to a patient, comprising:
- selecting at least one lead to provide an ECG signal from the patient;
- for each of the at least one selected leads:
- computing an average beat from a plurality of beats occurring during a predetermined averaging interval;
- determining an onset point and a J-point of the average beat;
- computing an isoelectric point of the average beat relative to the onset point;
- computing an interval complex measurement reflecting an S-T segment of the average beat based on the determined isoelectric point and J-point;
- computing an S-T segment separately for each beat during the averaging interval using the onset point and J-point of the average beat;
- sorting the computed S-T segments of each beat and discarding upper and lower marginal values;
- computing an each beat averaged measurement comprising an average of undiscarded S-T segments;
- computing an average of the interval complex measurement and the each beat averaged measurement;
- and
- reporting the computed average of the interval complex measurement and the each beat averaged measurement to a clinician.
Dependencies are inferred from the claim text.