Additional Cardiac Calculations
LOGIQ 500 Basic Users Manual
2276612–100 Rev. 0
10–23
Angle (cont’d)
If a fine adjustment of the 2 cursors is needed, press
Measurement to toggle which line cursor is active. Adjust the
active cursor with the Trackball and Zoom Size/Rotation
control.
Press Set to complete the angle measurement.
% stenosis (stenosis ratio)
To calculate percent stenosis in a B-Mode image:
The area of the blood vessel can be measured by the ellipse,
trace, circle, 2 distance or 1 distance methods. See
General
Measurements and Calculations
for details on the steps to take
when doing basic distance and area measurements. The Set
Up/Preset Program page 3 defines the default method.
Select % Steno from the Calculations Sub-Menu.
ANGLE
LV
Report
VOLUME
%
Steno
Figure 10–25. Cardiac Calculations Sub-Menu
The first cursor is the residual area of the blood vessel and the
second cursor is the lumen area of the blood vessel.
When using a distance measurement to calculate area for
% stenosis, the measurement should always be taken from a
cross sectional view of the vessel.
Do NOT take a distance measurement from a longitudinal view
for an area calculation. This may lead to an inaccurate
assessment of % stenosis.
CAUTION
Summary of Contents for 500
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