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
Animal welfare and rights in Argentina Animal welfare and rights in Argentina Animal welfare and rights in Argentina is about laws concerning and treatment of non-human animals in Argentina. Argentina has weak protections for animals by international standards. Argentina's Law 14246 (1954) prohibits cruelty toward animals. This does not include harm caused by failure to act, and it is not clear which animals the law applies to. Regarding farm animals in particular, Argentina also has legislation on animal slaughter and livestock transportation. There are also a legislative framework on farm animal health, which provides for the creation of an Animal Health Police force, and policy literature