Sewn on to the heart, the 3cm (1in) by 2cm patch, grown in a lab from a sample of the patient’s own cells, then turns itself into healthy working muscle.
It also releases chemicals that repair and regenerate existing heart cells.
That’s amazing. What a science-fiction technique.
Trials in human patients are supposed to start in a year or two. Offhand I’d say that if I were having a heart problem, I’d volunteer right this minute.