ejection fraction

noun

: the ratio of the volume of blood the heart empties during systole to the volume of blood in the heart at the end of diastole expressed as a percentage usually between 50 and 80 percent
An echocardiogram obtained 6 days after the initiation of chemotherapy showed that the ejection fraction had improved to 45%; 2 weeks later it was 66%.Patrick T. O'Gara et al., The New England Journal of Medicine

Dictionary Entries Near ejection fraction

Cite this Entry

“Ejection fraction.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/ejection%20fraction. Accessed 8 Oct. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!