Gene therapy has reinvigorated damaged heart cells in the lab, a step towards new treatments for heart failure.

Researchers at Jefferson Medical College in Philadelphia, Pennsylvania and Duke University in Durham, North Carolina used a virus to carry a gene into heart cells of people with congestive heart failure.

Congestive heart failure is a condition in which the heart can’t maintain normal blood circulation throughout the body, resulting in fluid build up in various parts of the body such as the lungs, abdomen and legs.

The condition is common, representing the majority of heart failure patients.

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