> first implant of an artificial heart that can beat for up to five years One: I don't think this is the first. Two: the artificial hearts I've heard of don't actually beat ; it's more of a constant flow.
This one actually regulates itself based on your physical activity. They also think it should beat faster if you're in a stressful or emotional situation (such as meeting with your crush). This is based on the fact that your blood vessels will dilate themselves and the artificial heart will compensate.