FiReaNGeL writes to tell us that researchers at the Children's Hospital in Boston are on the road to crafting a pacemaker from living cells instead of an artificial implant. From the article: "When the engineered tissue was implanted into rats, between the right atrium and right ventricle, the implanted cells integrated with the surrounding heart tissue and electrically coupled to neighboring heart cells. Optical mapping of the heart showed that in nearly a third of the hearts, the engineered tissue had established an electrical conduction pathway, which disappeared when the implants were destroyed. The implants remained functional through the animals' lifespan (about 3 years)."
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