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Figure 4 Scatter plots showing the relationships between the mitral regurgitation (MR) fraction and medial papillary muscle (PM) peak systolic strain (left panel) or medial PM tethering distance (right panel). The MR fraction was significantly correlated with the medial PM tethering distance in all of the subjects taken together and those in group 1. While the MR fraction did not show a significant correlation with the PM systolic strain in all of the subjects with variable degrees of associated left ventricular (LV) remodeling, there was a significant correlation in group 1 patients with LV remodeling of a similar location and extent.
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