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 (EF) refers to the percentage of blood being pumped out of your heartâs lower chambers. If your EF is low, you could have heart failure. Hereâs what you can do.