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.
Doctors usually measure the ejection fraction of your left ventricle (LVEF), the heart chamber that pumps blood to your entire body. (Your right ventricle pumps blood to your lungs.) If your LVEF drops below 35%, you may be at risk for dangerous arrhythmias or sudden cardiac death.ots of things can cause low EF, such as a heart attack, coronary artery disease, cardiomyopathy, heart valve disease and systolic heart failure.