What does 45% mean in an echo report?

My echo says my heart is at 45% and 50% is normal. What does that mean?

Submitted by Paul from Bellflower, California on 03/17/2014

The normal percentage of blood ejected from the heart is in the range of 50-70% depending on different factors. If the left ventricular ejection fraction (LVEF) is 45% (& that is not a measurement error), then it is mildly reduced. The list of possible reasons why is quite extensive & should be discussed with your doctor.