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.
Updated January 14, 2016. The ejection fraction is a measurement doctors very commonly use to assess how well the heart is able to pump blood. Specifically, the ejection fraction is the proportion of blood that is pumped from the left ventricle (the main pumping chamber of the heart) with each heart beat. Read about the heartâs chambers and valves.