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.
Low ejection fraction, sometimes called low EF, is the term we use to describe your ejection fraction if it falls below 55%. It means your heart isnât functioning as well as it could. If a diagnostic test indicates that you have low ejection fraction, your doctor will want to thoroughly check you for a heart condition.