LVEF is a good clinical indicator of left ventricular systolic function. LVEF
may be determined either by echocardiograph or radionuclide ventriculography.
The calculation of LVEF is relatively simple in concept, although the
calculations of volumes from echocardiographic images is more complex. Conceptually,
an estimation is made of the volume of blood in the ventricle at the end of
diastole (on left) and the volume of blood remaining in the ventricle at the end of
systole (on right).
LVEF is the fraction of blood ejected in systole and is calculated as follows:
This formula gives one a fraction, e.g., 0.60. Multiply this fraction by 100
gives a % figure, e.g., 60%.
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