This is definitely one of the few cases where extensive animal experiments need to be considered. Create a heart, put it into a thousand pigs and see how they d

This is definitely one of the few cases where extensive animal experiments need to be considered. Create a heart, put it into a thousand pigs and see how they do. Once they do fine, go over to hundreds of primates. Afterwards go on with terminal human patients. It goes without saying that one should not waste animal lives or make them suffer for just any kind of experiments. But if the practical engineering of auch a device appears to be that difficult we should not risk the whole company on small-scale human experiments.