So what is ejection fraction!!!!!!!?

This sounds like something that eminates from a laboratory that maybe flies up into the air.

Ejection Fraction evaluates how well a heart is pumping. The figure is generally produced by an Echo Cardiogram scan.

Normal heart pumping levels are anywhere between 50-70%

Acute Heart Failure pumping levels are below 30%

My first Echo cardiogram produced a level between 15-20%

Three months later when I had an MRI scan it was up to above 30%