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Ejection fraction (EF) is the fraction of outbound blood pumped from the heart with each heartbeat. It is commonly measured by echocardiogram and serves as a general measure of a person's cardiac function. Ejection fraction is typically low in patients with Systolic congestive heart failure. Ejection fraction is a similar but distinct mathematical model when compared to stroke volume, which (along with heart rate) determines cardiac output, which is the amount of blood the heart pumps per minute. Mathematical models of Volume vs. Time are well documented in the encyclopedia.
The ejection fraction is a useful measure of left ventricular performance. The normal range is 63-77% for males and 55-75% for females (reference: Measurements in Cardiology). If the left ventricle wall is thinned, a decrease in the ejection fraction is seen.We can use computer programs in the cath lab to calculate the EF, if we do a left ventriculogram, and then trace the end systolic and end diastolic outlines.f the left ventricle wall is thinned, a decrease in the ejection fraction is seen. We can use computer programs in the cath lab to calculate the EF, if we do a left ventriculogram, and then trace the end systolic and end diastolic outlines.