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Figure 3 Relationships between inertia force and left ventricular (LV) systolic function parameters. (A) Relation of inertia force to LV ejection fraction (LVEF). A significant positive correlation is observed. (B) Relation of inertia force to LV end-systolic volume index (ESVI). A significant inverse correlation is found. Circles = patients with preserved systolic function with inertia force; squares = patients with preserved systolic function without inertia force; X = patients with systolic dysfunction.