BiVACOR's Total Artificial Heart (TAH) is not designed to beat like a real one. But even without flexible chambers or pumping diaphragms, BiVACOR claims it is powerful enough to sustain a man during exercise, and small enough to suit most men and women.
The only moving part is hidden within; a single, magnetically levitating rotor which pumps blood to the lungs and on to the rest of the body. Because the spinning rotor does not make contact with any other surface, there is no chance that friction will cause damage over time.