Visualization of myocardial infarct size in diagnostic ECG
The segments of an anatomically corresponding bull's eye graph familiar to echocardiologists is annotated by coloring those segments for which ECG data indicates the presence of myocardial infarction injury. In an illustrated example, segments are colored with a second color when the ECG data corresponding to those segments are indicated as being the site of a coronary occlusion. The segments of the bull's eye graph may be colored in a third color with the results of a diagnostic imaging exam, such as by coloring segments exhibiting wall motion abnormalities with a third color.
1. A diagnostic ECG system for visually displaying a size of a myocardial infarction (MI), the system comprising:
an ECG analysis module responsive to an ECG lead signal and configured to produce parameters corresponding to certain anatomical locations of the heart for which the ECG parameter indicates the MI;
a bull's eye graph subdivided into a plurality of segments anatomically corresponding to different areas around the left ventricle of the heart and at different levels of the left ventricle in relation to an apex of the heart; and
an image processor configured to visually distinguish one of the plurality of segments corresponding to anatomical locations of the heart identified by the produced parameters to visually display the size of the MI.
2. The diagnostic ECG system of claim 1 , wherein the parameters produced by the ECG analysis module comprise at least one of an R wave amplitude or notch, a P wave amplitude or polarity, a QRS vector axis shift, a Q wave, a T wave, and an ST elevation of an ECG waveform.
3. The diagnostic ECG system of claim 1 , wherein the parameters produced by the ECG analysis module further comprise parameters relevant to MI size and left ventricle location using the Selvester scoring system.
4. The diagnostic ECG system of claim 3 , wherein the ECG analysis module is further configured to map left ventricle location parameters relevant to MI size to segments of the bull's eye graph.
5. The diagnostic ECG system of claim 4 , wherein the ECG analysis module is further configured to mark the segments of the bull's eye graph to which the left ventricle location parameters are mapped with a first distinctive color or shading.
6. The diagnostic ECG system of claim 5 , wherein the ECG analysis module is further configured to map a determined location where an occlusion is present to a segment of the bull's eye graph and to mark the segment in a second distinctive color or shading.
7. The diagnostic ECG system of claim 6 , further comprising a display device configured to display the size of the MI with the first and second distinctive colors or shadings, and
wherein the display device is further responsive to the ECG analysis module to display the MI size derived from a Selvester scoring system as a percentage value.
8. The diagnostic ECG system of claim 7 , wherein the display device is further responsive to the ECG analysis module to simultaneously display a plurality of ECG lead waveforms and the bull's eye graph.
9. The diagnostic ECG system of claim 8 , wherein the bull's eye graph further comprises a 17-segment bull's eye graph.
10. The diagnostic ECG system of claim 8 , wherein the segments of the bull's eye graph which are visually distinguished by ECG parameter data are visually distinguished by a first color or shading, and a segment which is visually distinguished by WMA data is visually distinguished by a second color or shading.
11. The diagnostic ECG system of claim 1 , wherein the ECG analysis module is further configured to determine a location in a coronary artery where an occlusion is present.
12. The diagnostic ECG system of claim 11 , wherein the ECG analysis module is further configured to map the determined location where the occlusion is present to a segment of the bull's eye graph.
13. The diagnostic ECG system of claim 1 , wherein the ECG analysis module is further configured to determine a location where an occlusion is present using ECG data.
14. The diagnostic ECG system of claim 1 , further comprising an ultrasound imaging system configured to analyze heart wall motion abnormalities (WMA) and produce anatomically corresponding WMA data,
wherein an anatomically corresponding segment of the bull's eye graph is further visually distinguished by ultrasonic imaging derived wall motion abnormality data.