Transcatheter Aortic Valve Replacement Versu Surgical Aortix Valve Replacement for Treating Elderly Patients With Severe Aortic Stenosis and Small Aortic Annuli: A Prospective Randomized Study The VIVA Trial

The TAVR procedure will be performed with the Edwards SAPIEN XT or SAPIEN 3 valve (20, 23 or 26 mm).

The TAVR procedure will be performed with the CoreValve Evolut R valve system (23 or 26 mm).

The TAVR procedure will be performed with the ACURATE neo aortic valve.

The choice of the type and size of valve, utilization of additional procedures such as root enlargement will be left at the discretion of heart team of the treating the patient.