PARTNER II Trial: Placement of AoRTic TraNscathetER Valves II - XT Intermediate and High Risk

The PIIA cohort is a prospective multi-center trial undergoing aortic valve replacement for severe aortic stenosis. Patients randomized to the treatment arm will receive an Edwards SAPIEN XT THV with either transfemoral, transapical or transaortic delivery access. Patients in the control arm will receive a surgical bioprosthetic heart valve via aortic valve replacement surgery. To assure that patients with an STS score ≥ 4% have been selected.