• Subject who is judged by a Heart Team, including a cardiac surgeon, to be appropriate for transcatheter heart valve intervention therapy, and is deemed to be at intermediate or low risk for open surgical aortic valve replacement (i.e., heart team estimates risk of surgical mortality \< 7% at 30 days, considering the Society of Thoracic Surgeons (STS) risk score, overall clinical status, and other clinical co-morbidities unmeasured by the risk calculator). \*

• New York Heart Association (NYHA) Functional Classification of II, III, or IV \*

• Degenerative aortic valve stenosis with echo-derived criteria, defined as:

• aortic valve area (AVA) of ≤ 1.0 cm2 (or indexed EOA ≤ 0.6 cm2/m2) AND either mean gradient ≥ 40 mmHg or peak jet velocity ≥ 4.0 m/s or doppler velocity index (DVI) ≤ 0.25. The echocardiogram supporting the qualifying AVA baseline measurement must be performed within 90 days prior to informed consent). \*

• Aortic annulus diameter of 19-30 mm and ascending aorta diameter of 26-44 mm for the specified valve size listed in the IFU, as measured by CT (systolic phase) conducted within 12 months prior to informed consent.