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.
The ejection fraction (EF) is the measure of how much blood pumped out of the heart with each of its contractions. According to the Heart Rhythm Society, low ejection fraction can be improved by cutting down salt intake, managing fluid intake and engaging in regular exercise. Keep Learning.