User's Manual

Using Vscan Extend apps
Vscan Extend – User Manual 5-117
5721203-100 Rev. 13
LVivo EF app
The LVivo EF app enables an automated edge detection of left
myocardial wall and calculates end-systolic, end-diastolic left
ventricular volumes and ejection fraction using apical 4-chamber
views.
This app has been developed by and licensed from DiA Imaging
Analysis Ltd.
The LVivo EF app uses only a single plane (apical 4-chamber)
view to calculate Ejection Fraction (EF). The app automatically
selects the frame with maximal volume (ED) and minimal
volume (ES) from a single cardiac cycle and uses them for EF
calculation. The Ejection Fraction value is calculated using
Modified Simpson’s method for the left ventricle.
The app is a tool to be used by clinicians that have received
training and are qualified to use ultrasound for cardiac function
evaluation. The results obtained are recommended to be used
adjunctively with other clinical information like medical history,
physical exam and other investigations and not as a sole source
of information for guiding patient management decisions.
The range and accuracy of the EF, EDV and ESV values
obtained with the LVivo EF app are available in the additional
information section below.
NOTE: * Applications under GE Marketplace are available as options
(not available in all geographies).
NOTE: The LVivo EF app is not intended for pediatric cardiology and is
not intended to be used for pediatric patients.
Using LVivo EF app
1. Scan the heart in apical 4 chamber view using the Cardiac
preset.
NOTE: The LVivo EF app can only be used with the sector probe
using the Cardiac preset.
2. Adjust the image to see an optimized left ventricle.
To obtain a proper EF measurement, follow the below
guidelines
• Length of at least 1.5 beats.
• Septal alignment - The interventricular septum should
be parallel to the image plane and endocardial border.
• Endocardial visualization – At least 2/3 of the
endocardium should be visualized.