28. Ascending aorta diameter >43 mm if the aortic annulus diameter is 23-29 mm; ascending aortic diameter > 40 mm if the aortic annulus diameter is 20-23 mm; or an ascending aorta diameter > 34 mm if the aortic annulus diameter is 18-20 mm (Extreme Risk only until 23 mm valve enrollment completion/closure in the CoreValve® US Pivotal Trial-High Risk Cohort).