GE Vivid i, Руководство пользователя

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Measurement and Analysis
126
Vivid i User’s Manual
2378958-100 Rev. 02
6. Press
SET
to anchor the start point of the measurement.
7. Trackball to the end trace position.
8. Press
SET
to anchor the end point of the trace.
The trace is automatically generated and the following
measurements are displayed in the
Measurement result
table :
• Maximum and mean Velocities
• Maximum and mean pressures
• Env. Ti
• Velocity time integral (VTI)
9. Trackball the cursor to the next heart beat.
10. Press
SET
to anchor the next heart beat starting point.
The heart rate (BPM) is displayed in the Measurement
result table .
MV E/A ratio
Adjust Compress
and reject controls
to optimize the
Doppler signal.
1. Generate the spectrum to be measured.
2. Press
FREEZE
to stop the cineloop.
3. Press
MEASURE
on the Control Panel.
4. Select MV E/A ratio in the Measurement Menu .
5. Trackball the cursor to the peak of the E wave.
6. Press
SET
to anchor the point.
7. Drag cursor to baseline to mark dT.
8. Press
SET
on the trackball area to anchor the second point.
9. Trackball the cursor to the peak of A wave.
10. Press
SET
to anchor the point.
the velocity at peak for E and A waves and the calculated
E/A ratio are displayed in the
Measurement result table .
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