ejection fraction
C2CEFR level
80/100Rarity: very rare
TechnicalRegister
The percentage of blood pumped out of the left ventricle with each heartbeat, a key measure of heart function.
A normal ejection fraction is above fifty-five per cent, so hers of thirty is significantly reduced.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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