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Figure 3 Correlations between the PISA method and (A) quantitative Doppler echocardiography and (B) two-dimensional echocardiography for calculation of the ERO area. Solid line regression line; gray zone = 95% confidence interval for 59 patients with a flat angle (220°) of the FC region (solid dots). Dashed line = identity line. Open dots superimposed represent the five patients with an obtuse angle of the proximal FC region (>220°).
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