Sort of: All hearts leave blood in the chambers. Weak hearts leave more.
Answered 8/21/2013
4.9k views
Heart disease: The ef is the ejection fraction or the percent of the volume of blood in the heart that is pumped with each beat. It is a measure of the ability of the heart to contract. It is normally 55 to 65 per cent. Abnormal hearts can have much lower ejection fractions.
Answered 12/10/2013
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