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contentuptodate· Content· item f20_42_21154
©2013 UpToDate ® Print Email Apical four-chamber echocardiogram with mitral (MAC) and tricuspid (TAC) Four-chamber echocardiographic image from a patient with end-stage renal disease. There is tricuspid annular calcification (TAC) and mitral annular calcification (MAC). Courtesy of Rosario V Freeman, MD, MS.