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In heart diseases, time only makes a physical injury worse. If starved for oxygen
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- Words:
- 768
- Submitted:
- Tue Jun 20 2006
... Ceren Yalaz 10-6 11.11.2005 Abstract of "Rebuilding the Heart" (1) In heart diseases, time only makes a physical injury worse. If starved for oxygen, heart cells die, their places filled not by fresh replacements but by scarring. Burdened with useless tissue, the heart needs to work harder to pump the blood. The overworked heart gets bigger and it can never catch up with its old pace. Despite doctors' efforts to save them with drugs, catheters, stents and surgery, 5 million Americans currently suffer from heart failure. So cardiologists have started shoring up the dying hearts with stem cells, immature cells that can be coaxed into transforming into many different types. In spite of the encouraging results of the experimental surgeries, noone knows how the treatment works. How the stem cells renew the tissue or the side-effects, are unkown. There are many experiments done on this issue: 1)mice who -deliberately caused
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