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October 11, 2008  
EDUCATION CENTER: Diagnostics
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    • Ejection Fraction (EF) Test


    Overview:
    An ejection fraction (EF) test measures how much blood is pumped from the heart (the left ventricle, which pumps blood through the aorta to the entire body) with each beat, and how much blood pumps through the heart with each beat. The "fraction" part is because the left ventricle never manages to pump out all the blood inside it--there's always a little bit left behind that remains waiting for the next contraction. The amount your left ventricle does pump out per beat is called the "ejection fraction". It's a percentage of the total amount of blood in the ventricle per heart beat.

    Detailed Information:
    A normal reading for an EF test is usually greater than 50%, which indicates that more than half of the blood volume is pumped from the heart with each beat.

    Learn More: Click here to learn more about Ejection Fraction
    (Windows Media Player only)

    Video courtesy of Guidant Corp.

    Last updated: 03-Jun-04


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