Olena Lupalo Bursa, Turkey   Portrait of Nikolai Amosov. Photo by L. Sherstennikov. In 1962, after his visit to the USA, heart surgeon Nikolai Amosov (1913-2002) became obsessed by artificial heart valves. There were no opportunities for this in the Soviet Union – neither information nor technology. Amosov sewed his first cusp of the artificial…