Review of Differences Between Mechanical And Bioprosthetic Valve Replacement In The Mitral Position

Abstract

T he mitral valve is a complex structure consisting of six components: The annulus, Leaflets, Chordae tendinae, papillary muscles, Left atrial wall, and the left ventricular wall. It consists of continuous veil of tissue inserted around the entire circumference of the mitral orifice, and it is fixed to some extent to the cardiac skeleton, but the free edges of the leaflet represent the highly mobile part. Understanding the pathological changes that lead to mitral valve regurgitation was improved by more success in understanding the anatomical and physiological character of the unique mitral valve apparatus, as it is a finely coordinated apparatus, mitral regurgitation has an extremely complex pathogenesis and it is best considered as a group of processes affecting the different components of the valve. Involvement of the mitral valve represents the most common of all locations of the rheumatic process. Nevertheless, some puzzling aspects have engendered an inquiry in to the exclusive role of the rheumatic process in causing mitral stenosis. A large proportion of patients with mitral stenosis as many as half in some series-have no history of rheumatic fever. The usual and most plausible explanation given is that patients with mitral stenosis who have no recollection of acute rheumatic fever suffered from subclinical rheumatic carditis; rheumatic fever is particularly appropriate to escape attention if unassociated with polyarthritis. Valvular-ventricular integrity is important for