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 test used to measure the amount of blood leaving the heart each time it contracts. Doctors typically measure ejection fraction when a patient shows signs of or is diagnosed with heart failure.