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Updated: Nov 20, 2025

Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
Published on: May 21, 2017
Allegra Transcatheter Heart Valve inside a Degenerated Sutureless Aortic Bioprosthesis
Maximilian Vondran1,2, Bernd Abt3, Holger Nef3,4
1Department of Cardiac and Thoracic Vascular Surgery, University Hospital Giessen and Marburg, Campus Marburg, Marburg, Germany.
Abstract:
Transcatheter aortic valve-in-valve implantation (VIV) is increasingly being used to successfully treat degenerated surgical aortic valve bioprostheses (SAVs). The new self-expanding transcatheter heart valve Allegra, from New Valve Technology with its special implantation mechanism, has proven its safety and feasibility for patients with degenerated SAVs, but it has never been used in the latest-generation sutureless SAV. To the best of our knowledge, this is the first description of the successful VIV of the Allegra prosthesis into a degenerated sutureless SAV, and the procedure yielded an excellent postinterventional hemodynamic results.
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