Implantation of a mitral allograft into the tricuspid valve position in active infective endocarditis.

In cases of severe and recurrent infectious lesions affecting the right heart, one alternative option for bioprosthetic intervention is the implantation of a mitral allograft (a donor heart valve) in the position of the tricuspid valve. We present a clinical case detailing the successful implantation of a fresh mitral allograft into the tricuspid position in a 37-year-old male patient diagnosed with active infective endocarditis of the tricuspid valve and a high risk of prosthetic endocarditis. The mitral allograft was anatomically implanted with annuloplasty using an expanded polytetrafluoroethylene band.

Chitosan/hyaluronic acid polyanion bilayer applied from carbon acid as an advanced coating with intelligent antimicrobial properties for improved biological prosthetic heart valves.

The tightly bonded shielding coating on biomatrix significantly enhances the functionality of medical devices, bioprostheses in particular. In our work we have obtained a polyelectrolyte coating on a biomatrix by sequentially depositing chitosan and hyaluronic acid (HA) from solutions in carbonic acid under pressure. This approach makes it possible to obtain hybrid biomatrix with a firmly bonded polymer screen due to the electrostatic bonding of polyions.