User:Bob K31416/Sandbox/MR

Secondary mitral regurgitation
Secondary mitral regurgitation can result from enlargement of the mitral annulus due to atrial fibrillation or dilatation of the left ventricle. With an enlarged annulus and corresponding enlarged mitral valve area, the valve leaflets are not able to cover the mitral valve when it is supposed to be closed, and it leaks. Additionally, dilatation of the left ventricle can cause

Dilatation of the left ventricle
, causing stretching of the mitral valve annulus and displacement of the papillary muscles. This dilatation of the left ventricle can be due to any cause of dilated cardiomyopathy, including aortic insufficiency, nonischemic dilated cardiomyopathy and Noncompaction Cardiomyopathy.

Mitral regurgitation can be due to the dilatation of the left ventricle, causing stretching of the mitral valve annulus and displacement of the papillary muscles. This dilatation of the left ventricle can be due to any cause of dilated cardiomyopathy, including aortic insufficiency, nonischemic dilated cardiomyopathy and Noncompaction Cardiomyopathy.