It is commonly held notion that without a pulse, one cannot survive. In fact before the advent of open-heart surgery a lack of a pulse was, medically speaking, death. The definition has changed of course. Now in fact, it seems that a pulse is not required.
Dr Billy Cohn and Bud Frazier at the Texas Heart Institute believed that trying to copy the heart was a waste of resources, instead they have used an existing device, a VAD which provides blood flow via the means of rotating blades and doubled it. Leaving a final contraption that they believe can fully replace the heart. “What we’ve kind of done is taken two motorcycles, strapped them together, and called it a car,” said Cohn. VADs or vascular assist devices have been around since 1994 and constantly been getting smaller and more efficient, making them the ideal technology to make a heart out of.