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.
A normal ejection fraction is 55 percent, according to Mayo Clinic. An ejection fraction of 50 percent or below is considered reduced and usually indicates some degree of damage to the heart. Doctors differ in their interpretations of ejection fractions in the 50 to 55 percent range. Continue Reading.