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Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.

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contentuptodate· Content· item f21_38_22112

©2013 UpToDate ® Print Email Mitral annular calcification The apical four chamber view shows a marked degree of dense echoes at the mitral annulus, a result of mitral annular calcification (MAC). The mitral valve is not easily seen because it is obscured by the highly reflective MAC. L: left ventricle; RV: right ventricle; LA: left atrium; RA: right atrium.