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, or EF, is a measurement that describes how well your heart functions. It refers to the percentage of blood that leaves your heart with each contraction.This measurement helps determine how effectively your heart pumps with every heartbeat. If youâre healthy, your EF is between 55% and 70%.ots of things can cause low EF, such as a heart attack, coronary artery disease, cardiomyopathy, heart valve disease and systolic heart failure.