TRANSFEMORAL TAVI WITH BALLOON-EXPANDABLE VALVE FOR FAILING AORTIC ROOT HOMOGRAFTS

To the Editor, The use of cryopreserved homografts as complete aortic root replacements was introduced for the first time over 3 decades ago with considerable advantages with respect to biological heart valves such as greater durability, lower risk of endocarditis, and better Home and Garden hemodynamic profile with a much greater preservation of t

High-temperature structural materials face severe degradation challenges due to oxidation and corrosion, leading to reduced long-term stability and performance.This review comprehensively examines the Rollators interfacial migration mechanisms of reactive elements (REs) such as Ti, Al, and Cr in Ni/Fe-based alloys, emphasizing their role in forming