GE Vivid S70, User Manual

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Advanced cardiac measurements and analysis
Vivid S70 / S60
–
User Manual
8-35
BC092760-1EN 01
Rejected segments in the Bull’s Eye are identified by the peak
values being replaced by a
X
, and that the segment is greyed
out in the colorimetric display.
Figure 8-18. Colorimetric display
Measurements available after complete analysis
The following parameters are also available after completed
analysis
• Global Strain (GS) values for all three apical views. In a
given view the Global Strain (GS), also called Global
Longitudinal Peak Strain (GLPS), is defined as the
percentage of maximal contraction over the whole cardiac
cycle of the entire myocardial wall relative to its end diastolic
length.
• Averaged Global Strain value from all three apical views.
• AVC measurement (either automatic, event timing
measurement or manual, see page 8-30)
• PSD: Peak Strain Dispersion is an index that displays
variability in time-to-peak (TTP) longitudinal strain. The
index is the standard deviation of the TTP strain (of all
segments) over the whole cycle. The TTP bulls-eye is useful
in association with PSD as the color scheme uses green
color to indicate normal contraction with a peak around
AVC, blue color to indicate early contraction, and yellow to
red color to indicate late contraction.
1. Segment with tracking quality scored as Not acceptable ( ).