That depends: There are situations in which a falsely high ejection fraction can occur. That is when there is regurgitation (backward flow) of blood in the left ventricle through he mitral valve, or in the rare event of a ventricular septal defect. A normal ejection fraction is 55-75%. Sometimes a high EF can be due to disease such as hypertrophic cardiomyopathy. Or could simply be due to a fit athletic heart.
Answered 9/29/2016
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