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.
José Domingo Molina Gómez would eventually be recognized as the "de facto" President of Argentina on September 23, 1955. On October 3, 1955 Molina was arrested by Eduardo Lonardi and later released. He died in Buenos Aires on 5 April 1969 at the age of 72. José Domingo Molina Gómez José Domingo Molina Gómez (26 September 1896 – 5 April 1969) was the Commander and Chief of the Argentine Army who appears to have temporarily taken "the reins of Government" on September 19, 1955. This was following the Revolución Libertadora which had begun on September 16, 1955. Eduardo Lonardi would eventually be recognized as