# Ejection Fraction --- **Ejection fraction** is the Generally speaking, a healthy individual's stroke volume is 60% of the volume the EDV, which is also called the [[ejection fraction]]. the amount of blood (in %) pumped out of the ventricles with each beat 50-70% is normal EF can be measured with an [[echocardiogram]] ## With hearth failure 40% and less - HR with **reduced** EF (HFrEF) or **systolic failure** like an old rubber band, the heart lacks enough strength or *contractility* 50% and higher - HR with **preserved** EF (HRpEF) or **diastolic failure** like a small glass container, the heart is too stiff and can't fill up enough (reduced *preload*) ___