What Is an Abnormal Ejection Fraction Heart Rate?

By Staff WriterLast Updated Apr 5, 2020 6:36:31 AM ET

An abnormally low heart ejection fraction is 40 percent or below, a measurement that may indicate cardiomyopathy or heart failure, according to the American Heart Association. An abnormally high heart ejection fraction is 75 percent or greater, which may indicate hypertrophic cardiomyopathy or other heart conditions.