Home > Health Library > Ejection Fraction
The ejection fraction is a measurement of the heart's efficiency
and can be used to estimate the function of the left ventricle, which pumps
blood to the rest of the body.
The left ventricle pumps only a fraction of the blood it contains.
The ejection fraction is the amount of blood pumped divided by the amount of
blood the ventricle contains. A normal ejection fraction is more than 55% of
the blood volume. If the heart becomes enlarged, even if the amount of blood
being pumped by the left ventricle remains the same, the relative fraction of
blood being ejected decreases. For example:
Current as of:
January 27, 2016
Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology & Martin J. Gabica, MD - Family Medicine & Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology
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