Benefits of the Artificial Heart and Heart Valve

        Several heart failures and diseases can be prevented by implanting an artificial heart, and at times can be less risky than heart surgery. The heart itself, composes of  several different valve, arteries and veins recieving deoxygenatd blood oxygenated blood. The Heart Muscle also composes of a system of valves and failure in these valves can eventually lead to pulmonary edema and congestive heart failure. Replacement of a valve by an artificial valve or heart can be solution to restore proper heart function.
         Many times due to these heart failures, it is often necessary to replace the valve with a man made one. The earliest known tended to "fracture" after years of use. A " one-way" valve is simple when constructed to function ouside the boy, but when placed inside the body, it is dificult for it to work. One modern  design of an artificial valve is the ball and cage model. The ball and cage model has a three pronged cage within which is a ball. . The ball lifts to allow blood to pass through and is pressed down into an opening to seal it and prevent backflow of blood.
     
Artificial heart usage beagn in 1953. The use of a heart-lung machine designed by a physician  John Gibbons, later proved  that an artificial heart could replace the real heart. Finally in 1966, William DeVries created the Jarvik 7, which eventually led to the 2000 inovation and improvemnt of the modern Jarvik. This beacme the first completely artificial heart to be installed. The first artificial heart to ever be implanted was the AbioCor, which was implanted on Robert Tools in 2001.

Hoyle, Brian. "Artificial Heart and Heart Valve." The Gale Encyclopedia of Science. Ed. K. Lee Lerner and Brenda Wilmoth Lerner. 3rd ed. Vol. 1. Detroit: Gale, 2004. 301-302. General OneFile. Web. 3 Dec. 2011