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Figure 4 Comparison of total RV scores among the three groups and the correlation with RVEF. If the cut-off value of the total RV score of 11 is used for differentiating patients with organic RVT from those with idiopathic RVT or normal subjects, the sensitivity, specificity and diagnostic accuracy were 79% (19 of 24 patients), 100% (48 of 48) and 93% (67 of 72), respectively. The organic RVT group had a significantly lower total RV score as compared with the control and idiopathic RVT groups (left panel). The total RV score had a close positive correlation with RVEF derived from radionuclide ventriculography: RVEF (%) = 1.4x total RV score + 23.7 (r = 0.702, p < 0.001) (right panel).