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.
Heart failure with preserved ejection fraction (HFpEF) is a clinical syndrome in which patients have symptoms and signs of HF with normal or near normal left ventricular EF (LVEF >50 percent) . Most patients with HFpEF also display normal left ventricular volumes and evidence of diastolic dysfunction (eg, abnormal pattern of LV filling and elevated filling pressures) .