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.
Shawn Liotta Gattuso. Liotta has served as a coach at the Professional, Collegiate, and High School level including serving as a head or assistant coach at every level of high school football in the State of Pennsylvania. Liotta was hired as the head coach of the Pittsburgh RiverRats in 2007. In 2008, the franchise moved to Erie, Pennsylvania, and Liotta remained with the franchise. In 2009, Liotta left Erie to join the Wheeling Wildcats. Liotta returned to Erie in 2010. In 2011, Liotta coached quarterback, Adam DiMichele to an MVP season in the Southern Indoor Football League, as well as a Northeast