The ejection fraction is a measurement of the heart's efficiency and can be used to estimate the function of the left ventricle, which pumps blood to the rest of the body. Ejection fraction goes down if you have heart failure or had heart attack or have cardiomyopathy etc. Coronary artery disease can be the cause of heart failure and the heart attack. To get more information please click the link just below:
http://www.webmd.com/hw/health_guide_atoz/ug1391.asp
http://www.mayoclinic.com/health/ejection-fraction/AN00360
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