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.
Science and technology in Argentina Science and technology in Argentina The most important aspects of science and technology in Argentina are concerned with medicine, nuclear physics, biotechnology, nanotechnology, space and rocket technology and several fields related to the country's main economic activities. According to the World Bank, Argentine exports in high-technology are products with high R&D intensity, such as in aerospace, computers, pharmaceuticals, scientific instruments, and electrical machinery. Benefiting from Latin America's highest literacy rates since shortly after President Domingo Faustino Sarmiento made primary education universally available in the 1860s and 1870s, Argentine researchers and professionals at home and abroad continue to enjoy a high