Radiology
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A patient with a Kay-Shiley mitral prosthesis had abnormal intermittent systolic tilting of the prosthetic disc by cinefluoroscopy. Echocardiography revealed an abnormal "atrial emptying index" consistent with mitral obstruction. ⋯ At surgery, there was no prosthetic orifice obstruction. It was concluded that the atrial emptying index may be abnormally low in prosthetic mitral regurgitation without stenosis.