Middle English (Scots) carne, from Scottish Gaelic carn; akin to Old Irish & Welsh carn cairn
Ejection fraction is commonly measured by an echocardiogram and serves as a general measure of a person's cardiac function. Ejection fraction is typically low in patients with the systolic form of congestive heart failure.
The ejection fraction (EF) refers to the amount, or percentage, of blood that is pumped (or ejected) out of the ventricles with each contraction. This percentage, or EF number, helps your health care provider determine if you have heart failure or other types of heart disease.A normal heart pumps just over half the heart's volume of blood with each beat â a normal EF is 50 to 75 percent.his percentage, or EF number, helps your health care provider determine if you have heart failure or other types of heart disease. A normal heart pumps just over half the heart's volume of blood with each beat â a normal EF is 50 to 75 percent.