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Figure 1 Transcatheter Valves

(A) The balloon-expandable Edwards SAPIEN valve incorporates a stainless steel stent, bovine pericardial leaflets, and a fabric sealing cuff. (B) The self-expanding CoreValve device incorporates a nitinol (nickel titanium) alloy stent with leaflets and a sealing cuff constructed of porcine pericardial tissue.