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Figure 7 Diagram showing mitral leaflet remodeling (thin arrows) caused by redistribution of the chordal tethering (thick black arrows) and coapting forces (dotted arrows) during apical (A) and posterolateral (PL) papillary muscle (PM) displacement. Apical displacement of the papillary muscles resulted in an apical shift of the leaflet coaptation line. Posterolateral displacement of the papillary muscles caused a posterior shift of the leaflet coaptation line. Therefore, the chordal coapting force component of the anterior leaflet increased, generating a nonuniform regurgitant orifice area. N = normal.