Worldwide, more than 1.3 million patients with diseased heart valves require surgery to replace them each year.

They take skin stem cells, 're-programme' them in the laboratory then graft them on to the diseased heart.

Many affected individuals also have heart disease, often involving enlarged or diseased heart valves.

Rip open the diseased heart of a corporation and what spills out?

But then again, we have always known humanity to be a species of diseased hearts.