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Calcification of mitral annulus

Mitral annular calcification (MAC) is a chronic fibrous, non-inflammatory and degenerative lesion of mitral fibrous support structure. It is generally seen in women and elderly patients over 70 years old. It often leads to a variety of heart diseases, such as mitral stenosis, mitral regurgitation, infective endocarditis, atrial fibrillation, atrioventricular block and so on. It is a common echocardiographic sign.


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