I just wanted to let you know that even though I'm looking quite old, I'm still a millenial.
So I just had a "New Year, New Me" moment and my resolution is to become a new and improved version of myself in a couple of weeks.
Don't worry, my wisdom won't change. You're still going to find the same useful information here. Stay tuned!
Fractional Area Change (FAC)
to get an FAC
1: Measure the End-Systolic and End-Diastolic LV
EDA. The optimal view is the LVSA view from the
mid Transgastric acoustic window. The left
ventricular area should be traced in end-diastole
and end-systole. The difference of the the two,
divided by the left ventricular end-diastolic area
is the fractional area change. Note that the
fractional area change is NOT the ejection fraction.
Ejection fraction is based upon (extrapolated) volumes
whereas the FAC is based upon area. Therefore,
values of FAC will be less than the ejection fraction.
See below for a comparison.