From www.youtube.com - January 14, 2012 2:16 PM

Damage in the heart can lead to an enlarged heart and the repercussion from it. Renowned heart surgeon, Dr. Mehmet Oz, explains the cases of heart attacks, how the heart muscle is damaged and weakened, enlarging of the heart, leading to heart failure. Visible is a pumping heart with damaged heart muscle, decreasing its pumping function