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 Division title. After leading the Explosion to the UIFL North title game in 2012, Liotta was named the 2012 UIFL Coach of the Year. Liotta re-signed for the 2012 season. In 2012 Liotta authored a book titled "Developing and Maintaining a Successful Professional Indoor Football Program". In 2013 Liotta led the Explosion to a perfect (12-0) record and the 2013 CIFL Championship. The Explosion finished with the league's top ranked offensive and defensive unit and Liotta was named the 2013 CIFL Coach of the Year. The 2013 season marked the 3rd consecutive year that Erie finished with the league's top