Ecg data display method for rapid detection of myocardial ischemia
AssigneeDraeger Medical Systems, Inc.
InventorsStefan P. Nelwan, Wolfgang Scholz
Life of this patent
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Abstract
Measured values of ST segment deviations obtained from a multi-lead ECG are transformed and displayed on a polar ST Circle Display, with zero ST deviation values located on a circle having a diameter that is greater than a maximum absolute ST segment deviation value obtained for any measured or derived lead. An ischemic condition and a location of the ischemia can thereby be easily determined.
Claims8
In a patient monitoring device, a method for displaying multi-lead electrocardiogram (ECG) data, comprising:
- determining, from a plurality of ECG leads provided by an ECG device, corresponding ST-segment deviations using a microprocessor;
- determining a maximum value of the ST-segment deviations using the microprocessor;
- defining in a polar diagram a zero ST-segment deviation by a concentric circle having a radius having a value of greater than a maximum magnitude of all determined ST-segment deviations;
- transforming select determined ST-segment deviations by adding the value of the radius to all selected determined ST-segment deviations;
- and
- displaying the transformed ST-segment deviations on the patient monitoring device in the polar diagram according to axial directions defined by the ECG leads.
A patient monitoring device for display of ST segment deviations in an electrocardiogram (ECG), the device comprising:
- an input unit configured to receive signals from ECG leads;
- a processor configured to
- determine from the signals ST segment deviations and, if required, computing ST segment deviation values of non-measured ECG leads,
- determine a maximum value of the ST-segment deviations,
- define in a polar diagram a zero ST-segment deviation by a concentric circle having a radius having a value of greater than a maximum magnitude of all determined ST-segment deviations, and
- transform select determined ST-segment deviations by the adding the value of the radius to all select determined ST-segment deviations;
- and
- a display for displaying the modified ST-segment deviations on the patient monitoring device in the polar diagram according to axial directions defined by the ECG leads.
Dependencies are inferred from the claim text.