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Can we actually restore function to the injured heart?

Yes. The amount of blood that is squeezed out of the chamber of the heart with each beat is a ventricular ejection fraction. In humans, ejection fraction is about 65%. After a heart attack, the ejection fraction drops down to 40% and a patient is on his or her way to heart failure. Every animal that received a human graphed cardiac muscle resulted in a substantial improvement in cardiac that averages between 40% to 48%.

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