Artificial heart valve 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. Natural heart valves are evolved to forms that perform the functional requirement of inducing unidirectional blood flow through the valve structure from one chamber of the heart to another. Natural heart valves become dysfunctional for a variety of pathological causes. Some
1969 Scotland rugby union tour of Argentina after a loss in the first test match, won the second and drawn the series. Complete list of matches played by Scotland in Argentina: 1969 Scotland rugby union tour of Argentina The 1969 Scotland rugby union tour of Argentina was a series of matches played during the month of September 1969 by Scotland in Argentina. It was also the first tour of a Scottish national side to Argentina. Despite the fact that Scottish Rugby Union did not consider this match as official test matches, was a real tour of Scottish national side. At those time, was usual for the Scottish