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 Shawn Liotta Shawn Liotta (born July 11, 1980) is an indoor football head coach who most recently coached the Erie Explosion. Over the past 8 seasons as a Head Coach at the professional indoor level, Liotta has established himself as a consistent winner and producer high scoring offensive units as evidenced by his team establishing 26 league and national records. Following the conclusion of the 2014 season, Liotta holds a 76% win percentage (58-19) during his tenure in Erie and has led his teams to 7 playoff berths in 8 seasons. Liotta holds a (35-5) record at the Erie Insurance