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.
Research is needed to determine if very. reduced EF (â¤20%) is a specific stroke risk factor. Introduction. Ejection fraction (EF) is the percentage of cardiac. left ventricular volume emptied in systole and is a. reliable measure of left ventricular systolic. dysfunction (LVSD). The prevalence of asymptomatic. LVSD in the general population is about 3% to 6%1-3. and about 37% of patients with heart failure (HF) in.