The study found, in early results, that cardiac stem cells might help fully repair damaged hearts.
Research findings indicated those infused with their own heart stem cells had more flexible heart muscle and their hearts pumped blood more efficiently and had half the scarring after treatments.
Larger studies must confirm the results before they are deemed valid.
The study was presented at the American Heart Association conference in Los Angeles.
Other studies involving stem cells and heart damage have had modest to moderate benefits with no negative effects on patients.
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