mblakehoops5205 mblakehoops5205

12-09-2017
Health

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Where was heart valve replacement surgery researched and originated?

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allissag63 allissag63

22-09-2017

Charles A. Hufnagel, M.D. (August 15, 1916 – May 31, 1989) was an American surgeon who in the early 1950s invented the first artificial heart valve.

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