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Relationship between %-expansion area and delivery balloon volume; comparison of SAPIEN 3 and SAPIEN XT. Percentage of observed THV expansion area measured with CT according to the using delivery balloon volume (nominal, under-filling, over-filling). The numbers in the columns denote the percentage of THV expansion area. The S3 THV at the THV-inflow and the native annular levels had a greater expanded THV area compared with the S-XT THV. THV, transcatheter heart valve.
