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 is a measurement of the percentage of blood leaving your heart each time it contracts. When the heart beats, it contracts or squeezes and then relaxes. During heart contraction, it pushes the blood within the pumping chamber out. When your heart relaxes, the chambers or ventricles refill with blood.