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Fig. 4. —Diagram shows relationship between CT obstruction index (red triangle), Miller index (green triangle), and right ventricle dilatation at echocardiography. Patients are divided into two subgroups based on presence or absence of right ventricle dilatation. A ratio of right ventricle area to left ventricle area (RV/LV) greater than 0.6 is considered indicative of right ventricle dilatation. Note that all patients except one with CT obstruction index greater than 40% had right ventricle dilatation and all patients except one with right ventricle dilatation had Miller index greater than 50%.





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