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.
Ejection Fraction - Explanation of Normal and Abnormal Range. Ejection Fraction (EF) is one of the measurements used by physicians to assess how well a patient's heart is functioning. Ejection refers to the amount of blood that is pumped out of the heart's main pumping chamber during each heartbeat. Fraction refers to the fact that, even in a healthy heart, some blood always remains within this chamber after each heartbeat.