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.
An ejection fraction is a measurement of the amount of blood pumped out during this second, emptying stage. Heart failure may be caused by problems with the heart's emptying phase, its filling phase or with both phases.