Ejection fraction (EF)

The percentage of end-diastolic volume that is ejected.


Percentage of the total diastolic volume of blood the heart ejects as it contracts.


The percentage of blood emptied from the ventricle during contraction; normal value for healthy hearts is 60-70 percent but may be much lower with valve disorders or myocardial infarction.


The ratio of the amount of blood pumped by the ventricles during one heartbeat to the volume of blood present at the end of the resting phase (diastole).


In cardiac physiology, the percentage of the blood emptied from the ventricle during systole; the left ventricular ejection fraction averages 60% to 70% in healthy hearts but can be markedly reduced if part of the heart muscle dies (e.g., after myocardial infarction) or in cardiomyopathy or valvular heart disease.


A quantitative assessment of the fraction of blood that is ejected from a ventricle after it has been filled.


 


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