PR. CH. CABROL - CNRI / SCIENCE PHOTO LIBRARY PR. CH. CABROL - CNRI / SCIENCE PHOTO LIBRARY
Artificial heart valves. Close-up of prosthetic aortic (left) and mitral (right) valves inside a heart. Artificial valves are used to replace the heart valves of patients with valvular heart disease, which causes one or all of the valves to malfunction.
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