Five years ago, scientists achieved the first success in engineering heart tissue. They seeded cells on a three-dimensional scaffold outside a living body - which then began beating as one. 10-15-99.
Researchers have found a deleted section of genetic matter can lead to deadly heart problems in mice and that supplying the missing genes can restore health, a finding with implications for humans. 09-24-99.
For the first time, researchers have grown working heart valves from lamb cells in research that suggests it may be possible to grow human valves to replace defective parts in people. 11-12-99.