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Ejection fraction (EF) shows how much blood the left ventricle pumps out with each contraction. EF is measured as a percentage. An ejection fraction of 60% means that 60% of the blood in the left ventricle is pushed out with each heartbeat. A normal heart’s ejection fraction is between 55% and 70%.
In general LVEF ≥ 55% is considered “normal” by guidelines, with a low normal designation for LVEF 50-55%. We assess the prognosis of participants with low normal LVEF in the Multi Ethnic Study of Atherosclerosis. All participants were asymptomatic and had no known clinical CVD at baseline.
Ejection fraction typically refers to the left side of your heart (left ventricular ejection fraction, or LVEF). It shows how much oxygen-rich blood your left ventricle pumps out to most of your body’s organs with each contraction.
Taking the question from the end, measurement of LVEF can be accomplished by a number of different means. Today, this is usually done with one of a host of imaging techniques such as echocardiography, magnetic resonance imaging, scintigraphy (nuclear medicine), or contrast ventriculography.
This clinical consensus statement revisits the role of left ventricular ejection fraction (LVEF) as a measurement of cardiac function, a prognostic marker and a major criterion to classify patients with heart failure, and gives new advice for clinical practice.