Moreno R, Baz JA, Moreu J, Berenguer A, et al. Transcatheter aortic valve implantation for degenerated aortic valves: Experience
with a new supra-annular device. The Spanish Allegra valve-in-valve (SAVIV)
registry. Catheter Cardiovasc Interv 2021 Apr 23. doi: 10.1002/ccd.29742.
PMID: 33890713