Scientists have long wondered whether human beings are able to generate new heart muscle cells after birth. Now, researchers from Sweden, using the isotope carbon 14 released in the 1950s during a period of above-ground testing of nuclear weapons as a marker to retrospectively date the age of heart cells, have found that the heart does indeed generate new cardiomyocytes (Bergmann O et al. Science. 2009;324:98-102).
Stephenson J. Heart Cell Renewal. JAMA. 2009;301(19):1977. doi:10.1001/jama.2009.688