Most heart muscle cells formed during childhood
New human heart muscle cells can be formed, but this mainly happens during the first ten years of life, according to a new study from Karolinska Institutet. Other cell types, however, are replaced more quickly. The study, which is published in the journal Cell, demonstrates that the heart muscle is regenerated throughout a person’s life, supporting the idea that it is possible to stimulate the rebuilding of lost heart tissue.During a heart attack, when parts of the heart muscle are starved of oxygen, many heart cells die and are replaced by scar tissue. As this impairs functionality, many