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Preprocedural imaging assessments. (A) Mitral annulus measurement, the annular area was 11.7 mm2. (B) Subvalvular apparatus evaluation, chordae tendinae was shown thickened. (C) Leaflets of mitral valve evaluation. (D) Implanted projection angle determination. (E) Neo-left ventricular outflow tract prediction. (F) Rheumatic mitral stenosis was displayed in preprocedural echocardiography.
