User's Manual

Using Vscan Extend
5-120 Vscan Extend – User Manual
5721203-100
Rev. 13
Using LVivo EF app (continued)
5. LVivo EF app automatically traces the LV contours and
draws a border around it.
6. End-Diastolic Volume (EDV), End-Systolic Volume (ESV)
and Ejection Fraction (EF) values are calculated and
displayed on the screen.
7. Press “Accept and store” to save the cine clip with
measurement results.
8. Press Close button to quit LVivo EF app.
CAUTION
• Users should confirm that the presented border trace
correlates with visual estimation of the endocardial border
and cardiac function before accepting and storing the
results. Small differences in tracking the border could result
in significant changes in the volume estimation leading to
inaccurate EF values. If the trace is not satisfactory or the
image quality is not acceptable, it is recommended to
discard the results and retry after acquiring a new image.
• The user can accept the result, take a new image to repeat
the calculation or decide to make their own assessment.
• In case of a doubt, it is recommended to refer the patient
for a more comprehensive assessment.
• The app uses one beat for calculation, hence it is
recommended to use the results with caution in cases
where a beat to beat variability in the EF value might be
expected. Examples include but not limited to high heart
rates, cardiac rhythm disorders like atrial fibrillation,
premature ventricular contraction etc.
• It is recommended to use the results with discretion for
clinical uses that may require a comprehensive evaluation
of cardiac function for guiding treatment decisions that are
critical for patient care. For example, monitoring of LV
function during treatment by chemotherapeutic drugs.
• Users should consider taking multiple measurements of
Ejection Fraction and averaging the results if an accurate
EF value is critical for guiding patient management
decisions.