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 an important tool in the diagnosis and monitoring of the heart and certain types of cardiomyopathies. Cardiomyopathy is a condition in which the heart is abnormally enlarged, thickened or stiffened. An EF of 55 to 75 percent is considered normal.