|
|
|
Warfarin Aspirin Reduced Cardiac Ejection
Fraction Study |
|
|
|
|
What Is the Wall Motion Score Index |
|
|
|
How to Use It |
|
|
|
Technical Acquisition Notes |
|
|
|
Test Cases |
|
|
|
|
|
Provides a prognostic objective easy index which
correlates to ejection fraction |
|
LVEF
= WMI x 30 |
|
Without the significant variability found in
measured biplane simpson’s ejection fraction |
|
|
|
|
|
|
|
|
|
16 Segment |
|
Utilizing Parasternal long and short axis |
|
Apical
four and two chamber |
|
Wall Scoring |
|
2 Normal |
|
1 Hypokinesis |
|
0 Akinesis |
|
-1 Dyskinesis |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ASE recommends 16 segment model |
|
Segments Score - |
|
Normal |
|
Hypokinetic |
|
Akinetic |
|
Dyskinetic |
|
|
|
|
|
|
|
|
|
|
|
|
Sum of
segments score ratings |
|
Number of segments scored |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
At least 10 cardiac cycles must be obtained in
each 2D view |
|
Measuring Ejection Fraction |
|
M-mode |
|
Mitral Inflow |
|
Pulmonary veins |
|
Doppler Tissue Imaging |
|
|
|
|
|
|
Acquire cine of apical four chamber view
visualizing all endocardial borders. |
|
Freeze picture. |
|
Trace endocardial border in diastole |
|
Scroll back and forth to make sure the borders
have been measured correctly |
|
Trace endocardial border in systole |
|
Scroll back and forth to make sure the borders
have been measured correctly |
|
Show report of calculated ejection fraction |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Notes