| http://www.w3.org/ns/prov#value | - More than 10???000 TAVRs were performed in the United States alone since Food and Drug Administration (FDA) approval of the first device in 2011.2 Contrary to Europe, where 10 different valves have been approved by the European Union, in the United States all except a few hundred cases have been performed using only 2 valves.
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