GE Vivid 7 User Manual

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 Figure 4-10: Segment scoring
1. Selected segment
2. Selected score
1. Scored segment 

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Blood pressure monitoring
The blood pressure (systolic and diastolic) for the selected view 
is displayed over the scoring diagrams (Figure 4-10).
1. Press BP.
The blood pressure 
data in the dialogue 
window can be edit-
ed.the systolic and diastolic blood pressure data for all levels 
is displayed in a dialogue window. 

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Quantitative TVI Stress echo analysis
The Vivid 7/Vivid 7 PRO Ultrasound unit provides a 
Quantitative TVI (QTVI) Stress analysis package based on 
Tissue velocity information (TVI). The TVI data is stored in a 
combined format with grey scale imaging during stress 
examination.
When selecting a template supporting TVI data acquisition, the 
ultrasound unit will automatically store TVI information, 
generally for the apical views of the stress...

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Velocity measure-
ments in mid and 
basal segments of 
the myocard will 
contain contribu-
tions from the api-
cal region of the 
myocard. E.g. if 
measured value in a 
mid segment is be-
low the cutoff value 
for this segment 
then this might re-
late to a reduced 
function in the mid 
or apical region.The velocity cutoff values are based on placing the sample 
volume at center of each cardiac segment at start of systole, 
the left ventricle...

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Accessing QTVI Stress analysis tools
The three QTVI Stress analysis tools are entered by pressing a 
dedicated button on the scoring diagram (see Figure 4-11) of 
the selected view. Only views with TVI data acquired will 
display QTVI Stress tools buttons on the respective diagrams.
 Figure 4-11: QTVI Stress tools buttons
Vpeak measurement
This tool enables the user to generate a tissue velocity profile 
for a given wall segment through the entire...

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To display a Vpeak measurement
1. Perform segment scoring as described on page 165.
When performing scoring i a view from a peak level, the 
Vpeak measurement button (V) is displayed in the 
corresponding diagram.
2. In the Scoring diagram, press V.
The trackball cursor is changed to sampling area and the 
scored peak views are updated showing:
•  A diagram with the current segment highlighted (scoring 
bullet with a ring) and the segments...

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 Figure 4-12: Vpeak QTVI Stress display
1. Threshold for current segment (green)
2. Sampling point
3. Current segment
4. Vpeak threshold for current segment5. Color-coded tissue velocity:
6. Result window with tissue velocity profile
Color-coding (velocity thresholds and tissue):
• Green: velocities above threshold value
• Yellow: velocities near threshold (0 to -10% interval)
• White: velocities below threshold value - 10% 

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V-peak measurement interpretation
The systolic Vpeak in the tissue velocity profile is automatically 
detected and highlighted by a vertical bar (see Figure 4-12). 
The automatically detected Vpeak should be visually verified by 
the user. In addition Vpeak thresholds are displayed as color-
coded horizontal lines (see Figure 4-12). These thresholds 
represent statistical guideline values for peak velocity at peak 
stress level (Dobutamine stress...

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Tissue Tracking
Tissue Tracking calculates and color-codes the displacement in 
tissue over a given time interval. The displacement is found as 
the time integral (sum) of the tissue velocities during the given 
time interval. The color-coded displacements calculated in the 
myocardium are displayed as color overlay in the respective 
acquisition window.
By studying the color patterns generated in the different 
segments, the user can confirm the...

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Quantitative analysis
Quantitative analysis enables further analysis based on 
multiple tissue velocity traces. Quantitative analysis is 
performed using the Quantitative analysis package described 
in Chapter 7, ’Quantitative Analysis’ on page 233.
To start quantitative analysis
1. Trackball to a loop with TVI data (usually an apical view at 
peak level).
2. Press 
SELECT on the control panel.
3. Trackball to the corresponding Wall segment...