ejection fraction

noun

The proportion of blood ejected out of the left ventricle with each heartbeat.

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Meanings

nounejection fraction (plural ejection fractions)

plural ejection fractions

  1. cardiologyThe proportion of blood ejected out of the left ventricle with each heartbeat.

    Isoproterenol produced vasodilatation and increased rate, with reduction of EDV and increase in ejection fraction in normal subjects.

    1964 January 28, William C. Elliott, Francis J. Lane, Richard Gorlin, “Measurement of left ventricular volume in man by thermodilution”, in The American Journal of Cardiology, volume 13, number 1, page 106
Cite this entry
APA

ejection fraction. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/ejection%20fraction

MLA

“ejection fraction.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ejection%20fraction. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “ejection fraction,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/ejection%20fraction.

Source: ejection fraction on Wiktionary, CC BY-SA 4.0.