The causes of<unk><unk>  (MR) depend on the acuity of the valvular abnormality and the underlying pathological mechanism.  Acute MR occurs when there is sudden disruption of one or more of the components of the<unk>  valve, such as leaflet perforation, rupture of a chordae tendineae, or rupture of the papillary muscle. The sudden disruption of the<unk>  valve can be caused by infective endocarditis, degenerative<unk>  valve disease, or acute ST elevation myocardial infarction.  Chronic primary MR is most commonly caused by<unk>  valve prolapse; other causes include rheumatic fever and Marfan's syndrome.  Chronic secondary MR results from the dysfunction and dilatation of the left ventricle rather than an intrinsic abnormality in one of the components of the<unk>  valve and it can be caused by coronary artery disease (ischemic) or any disease causing left ventricular dysfunction and dilatation (functional).
Mitral regurgitation causes
Mitral stenosis causes
Pulmonary valve stenosis causes
Tricuspid stenosis causes
Mitral valve prolapse causes
Aortic stenosis causes
Hypertrophic cardiomyopathy causes
Left ventricular hypertrophy causes