Scientists grow patch to heal a broken heart

Heart disease is the leading cause of death in many parts of the world, including the U.S., England and Canada, so it's not surprising that bioengineers at Duke University are excited by what they believe could be an important first step toward growing a living “heart patch” to repair damaged heart tissue. In a series of experiments using mouse embryonic stem cells, the bioengineers used a novel mold of their own design to fashion a three-dimensional "patch" made up of heart muscle cells, known as cardiomyocytes. The new tissue exhibited the two most important attributes of heart muscle cells - the ability to contract and to conduct electrical impulses.

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