Assessment of valve implantation in the descending aorta as an alternative for aortic regurgitation patients not treatable with conventional procedures.

"Declarations Conflicts of interestThe authors declared that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. Conflicts of interest The authors declared that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper."

"Funding Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. If the presentation of this article in a Scientific congress involves expenses, C. Ferrera reports that they would be covered by the Regional Government of Extremadura (Junta de Extremadura, Spain) through Grants No. GR21091 and IB20105 (partially financed by FEDER funds)."