Such calculations are useful in the design of artificial heart valves. For example, it finds use in artificial hearts and artificial heart valves. Craig Tweedy currently plays with Rory in The Artificial Heart. Chang and his team also made significant progress on the design of an artificial heart. It was recorded in 2011 and appeared on the album Artificial Heart. Pyrolytic carbon coatings are used in many applications, including artificial heart valves. Another U.S. team has a prototype called the 2005 MagScrew Total Artificial Heart. There are two basic types of artificial heart valve&colon; mechanical and tissue. He also produced Coulton's album, "Artificial Heart". The clip also features computer animations of an artificial heart valve and human faces. So far, only one person has benefited from Frazier and Cohn's artificial heart. He and his colleagues worked on developing new artificial heart valves from 1962 to 1967. The projected lifetime of the artificial heart is around 5 years (230 million beats). By 2004, a fully functioning artificial heart was developed. An artificial heart is a device that replaces the heart.