"It seems fairly reasonable to say that at least [infused stem cells] will not do harm," he said. "There is evidence that they are helping the heart to repair."
Bolli said that although the trial is small, the results so far have been "amazing."
"The very first time we try this totally new therapy we find such a dramatic improvement," he said. "I think this is rather encouraging."
Findings presented at medical meetings are typically considered preliminary until published in a peer-reviewed journal.
More information
Find out more about the promise of stem cell therapy at the U.S. National Institutes of Health.
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