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 term that describes the ability of the heart to pump out blood, which is compromised in a person with congestive heart failure. Essentially, ejection fraction is a measurement of the relative strength or weakness of a person's heart. The lower the ejection fraction, the more difficulty the heart has in pumping blood from the left ventricle. A normal ejection fraction may be in the range of 50-75%. Anything below 50% is generally indicative of chronic, or congestive, heart failure.