Implanting a mechanical valve in the pulmonary position: What's your bias?

A mechanical prosthesis for pulmonary valve replacement?

Apical aortic valve implantation in a patient with a mechanical valve prosthesis in mitral position.

A 67-year-old man diagnosed with severe aortic stenosis was admitted to our institution with pulmonary edema. The patient had a history of severe pulmonary fibrosis (total lung capacity, 57% of predicted value; diffusing capacity for carbon monoxide, 33% of predicted value) and had undergone coronary bypass grafting and mitral valve replacement with a St Jude mechanical valve (St Jude Medical, ...

Biomechanics of the pulmonary autograft valve in the aortic position.

Pulmonary autograft valve replacement has been simulated by implanting the pulmonary valve into the aortic position of the same cadaver heart from both human and porcine sources. The forces acting on the pulmonary valve leaflets have been calculated on the basis of a triaxial ellipsoid mathematical model. These forces on the pulmonary autograft valve were shown to be essentially similar to thos...

Mechanics of the pulmonary valve in the aortic position.

Mathematical models can provide valuable information to assess and evaluate the mechanical behavior and remodeling of native tissue. A relevant example when studying collagen remodeling is the Ross procedure because it involves placing the pulmonary autograft in the more demanding aortic valve mechanical environment. The objective of this study was therefore to assess and evaluate the mechanica...

Transcatheter Implantation of a Bovine Valve in Pulmonary Position

Background—Pulmonary regurgitation can lead to severe right ventricular dysfunction, which is a delicate postoperative problem in the long-term follow-up of patients who had surgery for congenital heart diseases. Clinical conditions of patients suffering from pulmonary valve incompetence are improved by valve replacement with a prosthetic valve. To date, the surgical approach is the only option...