Artificial heart valve was later changed to use silicone-coated material. The first implantation of mechanical heart valve to human was performed by Dr. Hufnagel on 11 September 1952, using the valve that he developed. This event accelerated the development of other artificial heart valves. Artificial heart valve An artificial heart valve is a device implanted in the heart of a patient with valvular heart disease. When one of the four heart valves malfunctions, the medical choice may be to replace the natural valve with an artificial valve. This requires open-heart surgery. Valves are integral to the normal physiological functioning of the human heart.
Ray Liotta Ray Liotta Raymond Allen Liotta (born December 18, 1954) is an American actor, film producer, and voice actor. Liotta is best known for his portrayal of Henry Hill in the crime drama "Goodfellas" (1990); other notable roles include Ray Sinclair in Jonathan Demme's "Something Wild" (1986), for which he received a Golden Globe nomination, Shoeless Joe Jackson in "Field of Dreams" (1989), Officer Pete Davis in "Unlawful Entry" (1992), Officer Gary Figgis in "Cop Land" (1997), Paul Krendler in "Hannibal" (2001), Fred Jung in "Blow" (2001), Tommy Vercetti in the video game "" (2002), Chief Gus Monroe in "John Q"