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 measure of blood that is pumped out by the left ventricle of the heart and is expressed in percentage. A normal ejection fraction usually lies between 50% and 70%.