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 In 1998, he received critical praise for his performance in "Phoenix" playing a compulsive gambler. In addition to his film roles, Liotta portrayed singer Frank Sinatra in the 1998 TV movie "The Rat Pack" (for which he received a Screen Actors Guild award nomination), provided the voice of Tommy Vercetti for the 2002 video game "Grand Theft Auto: Vice City", and appeared in the television drama "ER" in 2004, playing Charlie Metcalf in the episode "Time of Death". The "ER" role earned Liotta an Emmy for Outstanding Guest Actor in a Drama Series (Liotta later spoofed himself and his Emmy