The EF of the right heart, or right ventricular ejection fraction (RVEF), is a measure of the efficiency of pumping into the pulmonary circulation.
Modalities applied to measurement of ejection fraction is an emerging field of medical mathematics and subsequent computational applications.
[11] Historically, the gold standard for measurement of the ejection fraction was ventriculography,[12] but cardiac MRI is now considered the best method.
Healthy individuals typically have ejection fractions between 50% and 65%,[15] although the lower limits of normality are difficult to establish with confidence.
The 2021 European Society of Cardiology guidelines for the diagnosis and treatment of acute and chronic heart failure subdivided heart failure into three categories on the basis of LVEF:[21] A chronically low ejection fraction less than 30% is an important threshold in qualification for disability benefits in the US.
[citation needed] William Harvey described the basic mechanism of the systemic circulation in his 1628 De motu cordis.
In 1933, Gustav Nylin proposed that the ratio of the heart volume/stroke volume (the reciprocal of ejection fraction) could be used as a measure of cardiac function.
[28] In 1952, Bing and colleagues used a minor modification of Nylin's suggestion (EDV/SV) to assess right ventricular function using a dye dilution technique.
[31] Elliott, Lane and Gorlin used the term "ejection fraction" in a conference paper abstract published in January 1964.